#### Answer

x = ±13

#### Work Step by Step

According to the absolute value definition which states that:
|x| = x if x ≥ 0
|x| = -x if x ≤ 0
Therefore according to the definition x is equal to both positive and negative versions of 13. This statement holds true as both positive and negative values of 13 will equal 13 when subbed into x, this is due to the fact that the absolute value of any number is positive.