Solve the Absolute Value Inequality: |x+4| > 13

Question

Given:

\left|x+4\right|>13

Which of the following statements is necessarily true?

Video Solution

Step-by-Step Solution

To solve the inequality x+4>13 \left|x + 4\right| > 13 , we use the property of absolute values, which says that for a>b \left|a\right| > b , it implies a>b a > b or a<b a < -b .

Applying this to our problem, we have:

  • x+4>13 x + 4 > 13 or x+4<13 x + 4 < -13 .

Now, let's solve each inequality separately:

First inequality: x+4>13 x + 4 > 13

Subtract 4 from both sides to isolate x x :

x>134 x > 13 - 4

x>9 x > 9

Second inequality: x+4<13 x + 4 < -13

Subtract 4 from both sides to isolate x x :

x<134 x < -13 - 4

x<17 x < -17

Therefore, the solution to the inequality x+4>13 \left|x + 4\right| > 13 is x>9 x > 9 or x<17 x < -17 .

The correct answer choice is:

  • x>9 x > 9 or x<17 x < -17 .

Answer

x>9 or x<-17