Math Problem Statement

Solve the equation involving absolute value. (Enter your answers as a comma-separated list. If an answer does not exist, enter DNE.) |2x − 4| − 8 = −2

Solution

We need to solve the equation involving the absolute value:

2x48=2|2x - 4| - 8 = -2

Step 1: Isolate the absolute value term

First, isolate the absolute value by adding 8 to both sides of the equation:

2x4=2+8|2x - 4| = -2 + 8 2x4=6|2x - 4| = 6

Step 2: Set up two cases

The absolute value equation A=B|A| = B can be written as two separate equations:

  1. 2x4=62x - 4 = 6
  2. 2x4=62x - 4 = -6

Step 3: Solve both cases

Case 1: 2x4=62x - 4 = 6

Add 4 to both sides: 2x=102x = 10 Divide by 2: x=5x = 5

Case 2: 2x4=62x - 4 = -6

Add 4 to both sides: 2x=22x = -2 Divide by 2: x=1x = -1

Step 4: Final answer

The solutions to the equation are: x=5,1x = 5, -1

Would you like a detailed explanation of any particular step, or do you have further questions?

Here are 5 related questions for more practice:

  1. Solve 3x+75=2|3x + 7| - 5 = 2.
  2. Solve x+4=0|x + 4| = 0.
  3. Solve 3x1=93|x - 1| = 9.
  4. Solve 5x+2+4=10|5x + 2| + 4 = 10.
  5. Solve x+6=3x|x + 6| = 3x.

Tip: When solving absolute value equations, always remember to set up two cases to capture all potential solutions.

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Math Problem Analysis

Mathematical Concepts

Algebra
Absolute Value Equations
Linear Equations

Formulas

|A| = B -> A = B or A = -B
Basic linear equation: ax + b = c

Theorems

Absolute Value Properties

Suitable Grade Level

Grades 8-10