Solve |x-4| < 8: Absolute Value Inequality Analysis

Question

Given:

\left|x-4\right|<8

Which of the following statements is necessarily true?

Video Solution

Step-by-Step Solution

To solve the inequality x4<8 |x - 4| < 8 , we will break it down into two separate inequalities.

  • First, recognize that x4<8 |x - 4| < 8 means the expression x4 x - 4 can vary between -8 and 8 without violating the inequality constraint.
  • This gives us two inequalities to solve: 8<x4 -8 < x - 4 and x4<8 x - 4 < 8 .

Let's solve each inequality:
1. For 8<x4 -8 < x - 4 :
- Add 4 to both sides to isolate x x :
8+4<x4<x -8 + 4 < x \rightarrow -4 < x 2. For x4<8 x - 4 < 8 :
- Add 4 to both sides to isolate x x :
x<8+4x<12 x < 8 + 4 \rightarrow x < 12

By combining these results, we obtain the solution:
4<x<12 -4 < x < 12

Therefore, the range of x x that satisfies the inequality x4<8 |x - 4| < 8 is 4<x<12 -4 < x < 12 .

Hence, the correct statement from the given choices is 4<x<12\boxed{-4 < x < 12}.

Answer

-4 < x < 12