The solution is 6 0r -12
Step-by-step explanation:
| x +3 |=9
| x +3 | means x+3 or -(x+3)
When it x + 3
x + 3 = 9
x = 9-3
x = 6
When it is -(x+3)
-(x+3) = 9
-x - 3 = 9
-x = 9 + 3
-x = 12
Divide through by -1
-x/-1 = 12/-1
x = -12
The solution is 6 0r -12