Tentukan bentuk persamaan nilai mutlak! (pakai cara!!!)

A.
1 – 2x = 9
2x = 10
x = 5

1 – 2x = -9
2x = -9 + 1
x = -4

Hp {5, -4}

B.

-2 (2x – 2) = 8
-4x + 4 = 8
-4x =4
x = 4/4 = 1

-2 (2x – 2) = -8
-4x + 4 = -8
-4x = -4
x = -4/4 = -1

Hp {1, -1}