Explanation:
it must have 2 solutions, as the absolute value makes negative and positive values equal.
so, 2 approaches : positive and negative.
1. positive
(x + 2) + 4 = 11
x + 6 = 11
x = 5
2. negative
-(x + 2) + 4 = 11
-x - 2 + 4 = 11
-x + 2 = 11
-x = 9
x = -9
so, the third answer (x = 5, -9) is correct.