3x-4=7 One solution was found : x = 11/3 = 3.667 Rearrange: Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation : ...Algebra. Multiply 3x*3x. 3x ⋅ 3x 3 x ⋅ 3 x. Rewrite using the commutative property of multiplication. 3⋅3x⋅x 3 ⋅ 3 x ⋅ x. Multiply x x by x x by adding the exponents. Tap for more steps... 3⋅3x2 3 ⋅ 3 x 2. Multiply 3 3 by 3 3.3X VPN تطبيق لا يتطلب أي إعدادات معقدة. مع هذا التطبيق، سيكون بإمكانك تصفح الإنترنت بكل حرية مع حماية معطياتك من الأطراف الثالثة. لذا، وإذا كنت تبحث عن طريقة متميزة من أجل تصفح الإنترنت بكل حرية ...Algebra. Graph y=3x-13. y = 3x − 13 y = 3 x - 13. Use the slope-intercept form to find the slope and y-intercept. Tap for more steps... Slope: 3 3. y-intercept: (0,−13) ( 0, - 13) Any line can be graphed using two points. Select two x x values, and plug them into the equation to find the corresponding y y values.Simplify the right side. Tap for more steps... x = −13 x = - 13 We would like to show you a description here but the site won’t allow us.Solve an equation, inequality or a system. Example: 2x-1=y,2y+3=x. 1: 2: 3: 4: 5: 6: 7: 8: 9: 0., < > ≤: ≥ ^ √: ⬅: : F _ ÷ | (* / ⌫ A: ↻: x: y = +-GPopular Problems. Algebra. Solve for x 3x=6. 3x = 6 3 x = 6. Divide each term in 3x = 6 3 x = 6 by 3 3. 3x 3 = 6 3 3 x 3 = 6 3. Simplify the left side. Tap for more steps... x = 6 3 x = 6 3.2010–11 9-3X . 2011 View 38 photos Starting at $36,975; Consumer rating. 4.4. Combined mpg 20; Body style Wagon; Notable features in 2011: 210-hp, turbocharged four-cylinder for all models ...SPXL. SPXS. The Direxion Daily S&P 500® Bull and Bear 3X Shares seek daily investment results, before fees and expenses, of 300%, or 300% of the inverse (or opposite), of the performance of the S&P 500® Index. There is no guarantee the funds will meet their stated investment objectives.Algebra. Simplify 3x+6. 3x + 6 3 x + 6. Nothing further can be done with this topic. Please check the expression entered or try another topic. 3x+6 3 x + 6.Factor 3x^2+13x-10. 3x2 + 13x − 10 3 x 2 + 13 x - 10. For a polynomial of the form ax2 +bx+ c a x 2 + b x + c, rewrite the middle term as a sum of two terms whose product is a⋅c = 3⋅−10 = −30 a ⋅ c = 3 ⋅ - 10 = - 30 and whose sum is b = 13 b = 13. Tap for more steps... 3x2 − 2x+15x−10 3 x 2 - 2 x + 15 x - 10.Factor 3x^2+13x-10. 3x2 + 13x − 10 3 x 2 + 13 x - 10. For a polynomial of the form ax2 +bx+ c a x 2 + b x + c, rewrite the middle term as a sum of two terms whose product is a⋅c = 3⋅−10 = −30 a ⋅ c = 3 ⋅ - 10 = - 30 and whose sum is b = 13 b = 13. Tap for more steps... 3x2 − 2x+15x−10 3 x 2 - 2 x + 15 x - 10.To solve the quadratic equation 3x = 0.5x², we'll first rewrite it in standard quadratic form, which is ax² + bx + c = 0, and then proceed with the solution. Let's manipulate the equation to get it in standard form: 3x = 0.5x². Multiply both sides by 2 to eliminate the fraction: 2 · 3x = 2 · 0.5x². 6x = x². Now, bring all terms to one ...♦ SCARY VIDEOS ! ♦ If you like watching scary videos on YouTube, you are not afraid of ghosts and you want to get to know all the darkest corners of the internet. Join with me and discover all ...Mon Amour Toujours is pleased to introduce you to 3X Doll. Don't let the 3X Doll price fool you! Each one is beautiful and of superior quality. I'm sure…3x-3=0 One solution was found : x = 1 Step by step solution : Step 1 :Pulling out like terms : 1.1 Pull out like factors : 3x - 3 = 3 • (x - 1) Equation at the end ... 3x-3=6 One solution was found : x = 3 Rearrange: Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation : ...Evaluating Expressions Algebra Calculator can evaluate expressions that contain the variable x. To evaluate an expression containing x, enter the expression you want to evaluate, followed by the @ sign and the value you want to plug in for x. For example the command 2x @ 3 evaluates the expression 2x for x=3, which is equal to 2*3 or 6. How do you solve 3x + 6 = 5 ? x= −31 Explanation: Step 1) Subtract 6 from each side of the equation to isolate the x term and keep the equation balanced: 3x+6 −6 = 5−6 ... How do I solve 3x + 6 = 9 ? x= 1 Explanation: First of all I will use the shortcuts. After that I will show what is actually happening. This will help in all sorts of ways.Get the latest Direxion Daily Small Cap Bull 3X ETF (TNA) real-time quote, historical performance, charts, and other financial information to help you make more informed trading and investment ...Algebra Multiply 3x*3x 3x ⋅ 3x 3 x ⋅ 3 x Rewrite using the commutative property of multiplication. 3⋅3x⋅x 3 ⋅ 3 x ⋅ x Multiply x x by x x by adding the exponents. Tap for more steps... 3⋅3x2 3 ⋅ 3 x 2 Multiply 3 3 by 3 3. 9x2 9 x 2 Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations, just like a math tutor.3x-2. en. Related Symbolab blog posts. High School Math Solutions – Quadratic Equations Calculator, Part 1. A quadratic equation is a second degree polynomial ...52 Wk Range 37.990 - 66.135. The ProShares UltraPro Dow30 ETF gives investors 3x leveraged exposure to the Dow30. The fund has a 0.95% expense ratio and a 3-year annualized return of 24.72%. UDOW ...Jul 24, 2018 · 3X 2018 2h YOUR RATING Rate Drama A stripper, janitor and lawyer are found dead in a shopping mall and a crazed religious fanatic is behind it all. Find out why and how this went down in 3X. Directors Logan Bennett Leigh Takata Writer Leigh Takata Stars Ingrid Jordan Leigh Takata Trionna Moore See production, box office & company info how do you solve 3(4x − 15) = 19 ? x= 316 Explanation: 3(4x−15)= 19 Expand the parenthesis on the left side of the equation by multiplying all terms inside of ... 3x-4=-13 One solution was found : x = -3 Rearrange: Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation : ... 3x-4=-17 One ...Solve your math problems using our free math solver with step-by-step solutions. Our math solver supports basic math, pre-algebra, algebra, trigonometry, calculus and more.Solve for x 3x-3=6. 3x − 3 = 6 3 x - 3 = 6. Move all terms not containing x x to the right side of the equation. Tap for more steps... 3x = 9 3 x = 9. Divide each term in 3x = 9 3 x = 9 by 3 3 and simplify.3x-8=y Geometric figure: Straight Line Slope = 3 x-intercept = 8/3 = 2.66667 y-intercept = 8/-1 = -8.00000 Rearrange: Rearrange the equation by subtracting what is to the right of the ... x-8y=3 Geometric figure: Straight Line Slope = 0.250/2.000 = 0.125 x-intercept = 3/1 = 3.00000 y-intercept = 3/-8 = -0.37500 Rearrange: Rearrange the equation ...3x-4=7 One solution was found : x = 11/3 = 3.667 Rearrange: Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation : ...SPXL. SPXS. The Direxion Daily S&P 500® Bull and Bear 3X Shares seek daily investment results, before fees and expenses, of 300%, or 300% of the inverse (or opposite), of the performance of the S&P 500® Index. There is no guarantee the funds will meet their stated investment objectives.Algebra. Multiply 3x*3x. 3x ⋅ 3x 3 x ⋅ 3 x. Rewrite using the commutative property of multiplication. 3⋅3x⋅x 3 ⋅ 3 x ⋅ x. Multiply x x by x x by adding the exponents. Tap for more steps... 3⋅3x2 3 ⋅ 3 x 2. Multiply 3 3 by 3 3.Algebra. Solve for x 3x=21. 3x = 21 3 x = 21. Divide each term in 3x = 21 3 x = 21 by 3 3. 3x 3 = 21 3 3 x 3 = 21 3. Simplify the left side. Tap for more steps... x = 21 3 x = 21 3. Simplify the right side.y = − 4 3x y = - 4 3 x. Use the slope-intercept form to find the slope and y-intercept. Tap for more steps... Slope: − 4 3 - 4 3. y-intercept: (0,0) ( 0, 0) Any line can be graphed using two points. Select two x x values, and plug them into the equation to find the corresponding y y values.3x+1=0 One solution was found : x = -1/3 = -0.333 Step by step solution : Step 1 :Solving a Single Variable Equation : 1.1 Solve : 3x+1 = 0 Subtract 1 from both ... A student claims that the inequality 3x + 1>0 is always true because multiplying a number by 3 and then adding 1 to the result always produces a number greater than 0.SPXL. SPXS. The Direxion Daily S&P 500® Bull and Bear 3X Shares seek daily investment results, before fees and expenses, of 300%, or 300% of the inverse (or opposite), of the performance of the S&P 500® Index. There is no guarantee the funds will meet their stated investment objectives.Explore/Expand/Extract. It’s been a while since I’ve written on 3X, so here’s the basics. As an idea/product/company grows, value-maximizing behavior changes dramatically. Explore — to ...Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations, just like a math tutor.Explore/Expand/Extract. It’s been a while since I’ve written on 3X, so here’s the basics. As an idea/product/company grows, value-maximizing behavior changes dramatically. Explore — to ...Algebra. Multiply 3x*3x. 3x ⋅ 3x 3 x ⋅ 3 x. Rewrite using the commutative property of multiplication. 3⋅3x⋅x 3 ⋅ 3 x ⋅ x. Multiply x x by x x by adding the exponents. Tap for more steps... 3⋅3x2 3 ⋅ 3 x 2. Multiply 3 3 by 3 3.Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations, just like a math tutor.We would like to show you a description here but the site won’t allow us.Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations, just like a math tutor.3x-9=0 One solution was found : x = 3 Step by step solution : Step 1 :Pulling out like terms : 1.1 Pull out like factors : 3x - 9 = 3 • (x - 3) Equation at the end ... 3x≤21 One solution was found : x ≤ 7 Rearrange: Rearrange the equation by subtracting what is to the right of the less equal sign from both sides of the inequality : ...The research on spaced repetition shows that listening to audiobooks at 3x speed is a terrible way to retain information. In fact, it’s the opposite of what you should do. If you want to retain information, you should review the stuff you’ve already read. The benefits of spaced repetition. Source: Michael Nielsen.Cos 3X Formula Derivation. To derive the formula of cos 3x, we can write the formula as cos (2x + x) . Hence, we can use the sum formula and double angle identity to get the desired equation. Cos 3x = cos ( 2x + x) = cos 2x cos x - sin 2x sin x (Sum formula for cosine) = ( 1- 2 sin² x ) cos x - 2sin²x cos x ( double-angle identity)♦ SCARY VIDEOS !♦ If you like watching scary videos on YouTube, you are not afraid of ghosts and you want to get to know all the darkest corners of the inter...3x+1 x 1 (mod 2) x 2 x 0 (mod 2); the conjecture states that for each m 2 ZZ+, there is a k 2 ZZ+ such that C(k)(m) = 1, that is, any positive integer will eventually iterate to 1. Note that an odd number m iterates to 3m +1 which then iterates to (3m +1)=2. One may therefore \compress" the dynamics by considering the map T(x) = 8 <: 3x+1 2 x 1 ...Solve an equation, inequality or a system. Example: 2x-1=y,2y+3=x 3x+5. Share. Copy. Copied to clipboard. 3x^{1-1} The derivative of a polynomial is the sum of the derivatives of its terms. The derivative of a constant term is 0 ...how do you solve 3(4x − 15) = 19 ? x= 316 Explanation: 3(4x−15)= 19 Expand the parenthesis on the left side of the equation by multiplying all terms inside of ... 3x-4=-13 One solution was found : x = -3 Rearrange: Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation : ... 3x-4=-17 One ...Algebra. Solve for x 3x=27. 3x = 27 3 x = 27. Divide each term in 3x = 27 3 x = 27 by 3 3. 3x 3 = 27 3 3 x 3 = 27 3. Simplify the left side. Tap for more steps... x = 27 3 x = 27 3. Simplify the right side.♦ SCARY VIDEOS !♦ If you like watching scary videos on YouTube, you are not afraid of ghosts and you want to get to know all the darkest corners of the inter...3X VPN تطبيق لا يتطلب أي إعدادات معقدة. مع هذا التطبيق، سيكون بإمكانك تصفح الإنترنت بكل حرية مع حماية معطياتك من الأطراف الثالثة. لذا، وإذا كنت تبحث عن طريقة متميزة من أجل تصفح الإنترنت بكل حرية ...Cos 3X Formula Derivation. To derive the formula of cos 3x, we can write the formula as cos (2x + x) . Hence, we can use the sum formula and double angle identity to get the desired equation. Cos 3x = cos ( 2x + x) = cos 2x cos x - sin 2x sin x (Sum formula for cosine) = ( 1- 2 sin² x ) cos x - 2sin²x cos x ( double-angle identity)Linear Equation 3x+2 = 17 Similar Problems from Web Search 3x + 2 = 17 https://www.tiger-algebra.com/drill/3x_2=17/ 3x+2=17 One solution was found : x = 5 Rearrange: Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation : ... 3(x + 2) = 12 http://www.tiger-algebra.com/drill/3 (x_2)=12/ Simplify the right side. Tap for more steps... x = −13 x = - 13 ♦ SCARY VIDEOS ! ♦ If you like watching scary videos on YouTube, you are not afraid of ghosts and you want to get to know all the darkest corners of the internet. Join with me and discover all ...3x-2. en. Related Symbolab blog posts. High School Math Solutions – Quadratic Equations Calculator, Part 1. A quadratic equation is a second degree polynomial ...Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations, just like a math tutor.Algebra. Solve for x 3x=7. 3x = 7 3 x = 7. Divide each term in 3x = 7 3 x = 7 by 3 3. 3x 3 = 7 3 3 x 3 = 7 3. Simplify the left side. Tap for more steps... x = 7 3 x = 7 3. The result can be shown in multiple forms.Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations, just like a math tutor.The research on spaced repetition shows that listening to audiobooks at 3x speed is a terrible way to retain information. In fact, it’s the opposite of what you should do. If you want to retain information, you should review the stuff you’ve already read. The benefits of spaced repetition. Source: Michael Nielsen.Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations, just like a math tutor.3x+1=0 One solution was found : x = -1/3 = -0.333 Step by step solution : Step 1 :Solving a Single Variable Equation : 1.1 Solve : 3x+1 = 0 Subtract 1 from both ... A student claims that the inequality 3x + 1>0 is always true because multiplying a number by 3 and then adding 1 to the result always produces a number greater than 0.Solve your math problems using our free math solver with step-by-step solutions. Our math solver supports basic math, pre-algebra, algebra, trigonometry, calculus and more.Algebra. Graph y=3x-13. y = 3x − 13 y = 3 x - 13. Use the slope-intercept form to find the slope and y-intercept. Tap for more steps... Slope: 3 3. y-intercept: (0,−13) ( 0, - 13) Any line can be graphed using two points. Select two x x values, and plug them into the equation to find the corresponding y y values.The Direxion Daily S&P 500 Bull 3x Shares (NYSEARCA: SPXL), trading under the ticker SPXL, seeks daily investment results of 300% of the performance of the S&P 500 Index.3X VPN provides the fastest VPN server for you with the smart connection algorithm. All you need to do is just one tap. Features: FREE & Unlimited. ★ Unlimited Fast Speed. ★ Unlimited Use Time. ★ No Credit Card Required. ★ Free Forever. ★ Large number of servers, high-speed bandwidth.Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations, just like a math tutor.3x-2. en. Related Symbolab blog posts. High School Math Solutions – Quadratic Equations Calculator, Part 1. A quadratic equation is a second degree polynomial ...3x-3=0 One solution was found : x = 1 Step by step solution : Step 1 :Pulling out like terms : 1.1 Pull out like factors : 3x - 3 = 3 • (x - 1) Equation at the end ... 3x-3=6 One solution was found : x = 3 Rearrange: Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation : ...3x+1 x 1 (mod 2) x 2 x 0 (mod 2); the conjecture states that for each m 2 ZZ+, there is a k 2 ZZ+ such that C(k)(m) = 1, that is, any positive integer will eventually iterate to 1. Note that an odd number m iterates to 3m +1 which then iterates to (3m +1)=2. One may therefore \compress" the dynamics by considering the map T(x) = 8 <: 3x+1 2 x 1 ...Algebra. Graph y=3x-12. y = 3x − 12 y = 3 x - 12. Use the slope-intercept form to find the slope and y-intercept. Tap for more steps... Slope: 3 3. y-intercept: (0,−12) ( 0, - 12) Any line can be graphed using two points. Select two x x values, and plug them into the equation to find the corresponding y y values.Algebra. Graph y=3x+2. y = 3x + 2 y = 3 x + 2. Use the slope-intercept form to find the slope and y-intercept. Tap for more steps... Slope: 3 3. y-intercept: (0,2) ( 0, 2) Any line can be graphed using two points. Select two x x values, and plug them into the equation to find the corresponding y y values.3x+1. Share. Copy. Copied to clipboard. 3x^{1-1} The derivative of a polynomial is the sum of the derivatives of its terms. The derivative of a constant term is 0 ...52 Wk Range 37.990 - 66.135. The ProShares UltraPro Dow30 ETF gives investors 3x leveraged exposure to the Dow30. The fund has a 0.95% expense ratio and a 3-year annualized return of 24.72%. UDOW ...Algebra. Simplify 3x+6. 3x + 6 3 x + 6. Nothing further can be done with this topic. Please check the expression entered or try another topic. 3x+6 3 x + 6.Leveraged 3X ETF List. Leveraged 3X ETFs are funds that track a wide variety of asset classes, such as stocks, bonds and commodity futures, and apply leverage in order to gain three times the daily or monthly return of the respective underlying index. Such ETFs come in the long and short varieties.Linear Equation 3x+2 = 17 Similar Problems from Web Search 3x + 2 = 17 https://www.tiger-algebra.com/drill/3x_2=17/ 3x+2=17 One solution was found : x = 5 Rearrange: Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation : ... 3(x + 2) = 12 http://www.tiger-algebra.com/drill/3 (x_2)=12/ 3x=x-4 One solution was found : x = -2 Rearrange: Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation : ... 3x (4x-6) Final result : 6x • (2x - 3) Step by step solution : Step 1 : Step 2 :Pulling out like terms : 2.1 Pull out like factors : 4x - 6 = 2 • (2x - 3) Final result : 6x ...In the garage and on the road, the Beauer 3X looks just like a classic teardrop trailer, measuring 8.5 x 6 x 8.5 ft (2.6 x 1.85 x 2.6 m, body L x W x H, not including hitch in length).y = − 4 3x y = - 4 3 x. Use the slope-intercept form to find the slope and y-intercept. Tap for more steps... Slope: − 4 3 - 4 3. y-intercept: (0,0) ( 0, 0) Any line can be graphed using two points. Select two x x values, and plug them into the equation to find the corresponding y y values.Free Pre-Algebra, Algebra, Trigonometry, Calculus, Geometry, Statistics and Chemistry calculators step-by-stepAlgebra. Solve for x 3x=5. 3x = 5 3 x = 5. Divide each term in 3x = 5 3 x = 5 by 3 3. 3x 3 = 5 3 3 x 3 = 5 3. Simplify the left side. Tap for more steps... x = 5 3 x = 5 3. The result can be shown in multiple forms.3x-8=y Geometric figure: Straight Line Slope = 3 x-intercept = 8/3 = 2.66667 y-intercept = 8/-1 = -8.00000 Rearrange: Rearrange the equation by subtracting what is to the right of the ... x-8y=3 Geometric figure: Straight Line Slope = 0.250/2.000 = 0.125 x-intercept = 3/1 = 3.00000 y-intercept = 3/-8 = -0.37500 Rearrange: Rearrange the equation ...
Free math problem solver answers your algebra, geometry, trigonometry, calculus, and statistics homework questions with step-by-step explanations, just like a math tutor.. Macer hall obituaries
9x2-3x+2 Final result : 9x2 - 3x + 2 Step by step solution : Step 1 :Equation at the end of step 1 : (32x2 - 3x) + 2 Step 2 :Trying to factor by splitting the middle term 2.1 Factoring ... x2-3x+1 Final result : x2 - 3x + 1 Step by step solution : Step 1 :Trying to factor by splitting the middle term 1.1 Factoring x2-3x+1 The first term is, x2 ...Solve for x 3x-3=6. 3x − 3 = 6 3 x - 3 = 6. Move all terms not containing x x to the right side of the equation. Tap for more steps... 3x = 9 3 x = 9. Divide each term in 3x = 9 3 x = 9 by 3 3 and simplify.Algebra. Graph y=3x-6. y = 3x − 6 y = 3 x - 6. Use the slope-intercept form to find the slope and y-intercept. Tap for more steps... Slope: 3 3. y-intercept: (0,−6) ( 0, - 6) Any line can be graphed using two points. Select two x x values, and plug them into the equation to find the corresponding y y values.2010–11 9-3X . 2011 View 38 photos Starting at $36,975; Consumer rating. 4.4. Combined mpg 20; Body style Wagon; Notable features in 2011: 210-hp, turbocharged four-cylinder for all models ...In mathematics, a polynomial is an expression consisting of indeterminates and coefficients, that involves only the operations of addition, subtraction, multiplication, and positive-integer powers of variables. An example of a polynomial of a single indeterminate x is x² − 4x + 7. An example with three indeterminates is x³ + 2xyz² − yz + 1.Solve your math problems using our free math solver with step-by-step solutions. Our math solver supports basic math, pre-algebra, algebra, trigonometry, calculus and more.The sum of 3x plus 2 and -4 plus 3 is 3x+1 if the equation is (3x+2)+(-4+3). If they are two separate questions, 3x+2 remains as itself while -4+3=-1. What are the factors of the expression below 9x2 plus 6x plus 1?Get the latest Direxion Daily Small Cap Bull 3X ETF (TNA) real-time quote, historical performance, charts, and other financial information to help you make more informed trading and investment ...y = − 4 3x y = - 4 3 x. Use the slope-intercept form to find the slope and y-intercept. Tap for more steps... Slope: − 4 3 - 4 3. y-intercept: (0,0) ( 0, 0) Any line can be graphed using two points. Select two x x values, and plug them into the equation to find the corresponding y y values.The Direxion Daily S&P 500 Bull 3x Shares (NYSEARCA: SPXL), trading under the ticker SPXL, seeks daily investment results of 300% of the performance of the S&P 500 Index.Algebra. Simplify 3x+6. 3x + 6 3 x + 6. Nothing further can be done with this topic. Please check the expression entered or try another topic. 3x+6 3 x + 6.9 pm (just before you go to bed). If you have been told to take your medicine 4 times a day WITH FOOD, then an appropriate way to take the medicine would be: With breakfast. With lunch. With dinner. With a late evening snack just before going to bed.3x+1=0 One solution was found : x = -1/3 = -0.333 Step by step solution : Step 1 :Solving a Single Variable Equation : 1.1 Solve : 3x+1 = 0 Subtract 1 from both ... A student claims that the inequality 3x + 1>0 is always true because multiplying a number by 3 and then adding 1 to the result always produces a number greater than 0.3x-4=7 One solution was found : x = 11/3 = 3.667 Rearrange: Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation : ...Simplify the right side. Tap for more steps... x = −13 x = - 13 Cos 3X Formula Derivation. To derive the formula of cos 3x, we can write the formula as cos (2x + x) . Hence, we can use the sum formula and double angle identity to get the desired equation. Cos 3x = cos ( 2x + x) = cos 2x cos x - sin 2x sin x (Sum formula for cosine) = ( 1- 2 sin² x ) cos x - 2sin²x cos x ( double-angle identity).