Resourcesdown chevron
Testimonials
Plans
Sign in
Sign up
Resourcesright arrow
Testimonials
Plans
Bytelearn - cat image with glassesAI tutor

Welcome to Bytelearn!

Let’s check out your problem:

Devin solved the equation 12+5x−7=13x−4−8x12 + 5x - 7 = 13x - 4 - 8x. Here are his last two steps:\newline5+5x=5x−45 + 5x = 5x - 4\newline5=−45 = -4\newlineWhich statement is true about the equation?\newline(A)The solution is x=−4x = -4.\newline(B)There is no solution because 5=−45 = -4 is a false equation.\newline(C)There are infinitely many solutions because 5=−45 = -4 is a false equation.\newline(D)The solution is (5,−4)(5, -4).

View step-by-step helpView step-by-step help
Homeright chevron icon
Math Problemsright chevron icon
Precalculusright chevron icon
Solve trigonometric equationsright chevron icon

Full solution

Q. Devin solved the equation 12+5x−7=13x−4−8x12 + 5x - 7 = 13x - 4 - 8x. Here are his last two steps:\newline5+5x=5x−45 + 5x = 5x - 4\newline5=−45 = -4\newlineWhich statement is true about the equation?\newline(A)The solution is x=−4x = -4.\newline(B)There is no solution because 5=−45 = -4 is a false equation.\newline(C)There are infinitely many solutions because 5=−45 = -4 is a false equation.\newline(D)The solution is (5,−4)(5, -4).
  1. Simplify left side: Simplify the left side of the equation: 12+5x−7=5x+512 + 5x - 7 = 5x + 5.
  2. Simplify right side: Simplify the right side of the equation: 13x−4−8x=5x−413x - 4 - 8x = 5x - 4.
  3. Set equal: Set the simplified left side equal to the simplified right side: 5+5x=5x−45 + 5x = 5x - 4.
  4. Subtract to isolate: Subtract 5x5x from both sides to isolate constants: 5=−45 = -4.
  5. Recognize no solution: Recognize that 5=−45 = -4 is a false statement, indicating no solution exists.

More problems from Solve trigonometric equations

Question
Find all solutions with 0∘≤θ≤180∘0^\circ \leq \theta \leq 180^\circ. Give the exact answer(s) in simplest form. If there are multiple answers, separate them with commas.\newlinecos⁡(θ)=−1\cos(\theta) = -1\newline‾∘\underline{\hspace{2em}}^\circ
Get tutor helpright-arrow

Posted 7 months ago

Question
Kimi's school is 1515 kilometers west of her house and 88 kilometers south of her friend Franklin's house. Every day, Kimi bicycles from her house to her school. After school, she bicycles from her school to Franklin's house. Before dinner, she bicycles home on a bike path that goes straight from Franklin's house to her own house. How far does Kimi bicycle each day?\newline_____\_\_\_\_\_ kilometers
Get tutor helpright-arrow

Posted 7 months ago

Question
Evaluate. Write your answer as an integer or as a decimal rounded to the nearest hundredth.\newlinecos⁡35∘=\cos 35^\circ = __
Get tutor helpright-arrow

Posted 7 months ago

Question
Find all solutions with −90∘≤θ≤90∘-90^\circ \leq \theta \leq 90^\circ. Give the exact answer(s) in simplest form. If there are multiple answers, separate them with commas.\newlinecsc⁡(θ)=−1\csc(\theta) = -1\newline____ ∘\_\_\_\_\,^\circ
Get tutor helpright-arrow

Posted 8 months ago

Question
Evaluate. Write your answer in simplified, rationalized form. Do not round.\newlinecot⁡30∘=\cot 30^\circ = ______
Get tutor helpright-arrow

Posted 7 months ago

Question
The terminal side of an angle θ\theta in standard position intersects the unit circle at (8485,1385)(\frac{84}{85}, \frac{13}{85}). What is cos⁡(θ)\cos(\theta)?\newlineWrite your answer in simplified, rationalized form.\newline______
Get tutor helpright-arrow

Posted 7 months ago

Question
−90∘<θ<90∘-90^\circ < \theta < 90^\circ. Find the value of θ\theta in degrees.\newlinetan⁡(θ)=0\tan(\theta) = 0\newlineWrite your answer in simplified, rationalized form. Do not round.\newlineθ=\theta = ____∘^\circ\newline
Get tutor helpright-arrow

Posted 8 months ago

Question
Evaluate. Write your answer in simplified, rationalized form. Do not round.\newlinecsc⁡60∘=\csc 60^\circ = ______
Get tutor helpright-arrow

Posted 8 months ago

Question
θ\theta is an acute angle. Find the value of θ\theta in degrees.\newlinesec⁡(θ)=2\sec(\theta) = \sqrt{2}\newlineθ=\theta = ____°\degree
Get tutor helpright-arrow

Posted 7 months ago

Question
Evaluate. Write your answer in simplified, rationalized form. Do not round.\newlinecos⁡90∘=\cos 90^\circ = ____
Get tutor helpright-arrow

Posted 8 months ago

View all (88)

Related topics

Algebra - Order of OperationsAlgebra - Distributive Property`X` and `Y` AxesGeometry - Scalene TriangleCommon MultipleGeometry - Quadrant