tolong jelaskan caranya, makasih

Bab Nilai Mutlak
Matematika SMA Kelas X

2 |x + 5| = 6
|x + 5| = 6/2
|x + 5| = 3

x + 5 = 3
x = 3 - 5
x = -2

x + 5 = - 3
x = -3 - 5
x = -8

HP = {-2, -8}