Math Problem Statement

U

Solve |3 - 2x| = 7 + x

Solution

The image shows a graph of the absolute value function y=32xy = |3 - 2x|, and you are asked to solve the equation 32x=7+x|3 - 2x| = 7 + x.

Steps to solve 32x=7+x|3 - 2x| = 7 + x:

  1. Handle the absolute value function: The equation involves an absolute value, so we need to consider two cases:

    • Case 1: 32x03 - 2x \geq 0, which gives 32x=32x|3 - 2x| = 3 - 2x.
    • Case 2: 32x<03 - 2x < 0, which gives 32x=(32x)=3+2x|3 - 2x| = -(3 - 2x) = -3 + 2x.

Case 1: 32x03 - 2x \geq 0 (i.e., x32x \leq \frac{3}{2})

The equation becomes: 32x=7+x3 - 2x = 7 + x Solve for xx: 32x=7+x3 - 2x = 7 + x Subtract xx from both sides: 33x=73 - 3x = 7 Subtract 3 from both sides: 3x=4-3x = 4 Divide by 3-3: x=43x = -\frac{4}{3} Since 4332-\frac{4}{3} \leq \frac{3}{2}, this solution is valid for this case.

Case 2: 32x<03 - 2x < 0 (i.e., x>32x > \frac{3}{2})

The equation becomes: 3+2x=7+x-3 + 2x = 7 + x Solve for xx: 3+2x=7+x-3 + 2x = 7 + x Subtract xx from both sides: 3+x=7-3 + x = 7 Add 3 to both sides: x=10x = 10 Since 10>3210 > \frac{3}{2}, this solution is valid for this case.

Final Solution:

The solutions are: x=43orx=10x = -\frac{4}{3} \quad \text{or} \quad x = 10

Would you like further details on the steps, or have any additional questions?

Related Questions:

  1. How do you graph y=32xy = |3 - 2x| from the equation?
  2. Can you solve a similar equation like x4=2x+1|x - 4| = 2x + 1?
  3. How do you handle absolute value inequalities like 32x7|3 - 2x| \geq 7?
  4. How does the slope of the lines change when we break the absolute value equation?
  5. How would the solution change if the right-hand side of the equation were 7x7 - x instead of 7+x7 + x?

Tip:

When solving absolute value equations, always remember to check if the solutions fall within the correct range for each case to avoid extraneous solutions.

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Math Problem Analysis

Mathematical Concepts

Absolute Value
Linear Equations

Formulas

|A| = B can be solved by considering A = B and A = -B

Theorems

Basic properties of absolute value functions

Suitable Grade Level

Grades 10-12