Answers

2016-01-11T18:00:48+08:00
|x - 4| = |4 - x|
|x + x| = |4 + 4|
| \frac{2x}{2} |=| \frac{8}{2} |
x = 4

|x - 4| = |4 - x |
|4 - 4| = |4 - 4|
       0 = 0

0