Solve for x: |3x 12| = 18
|3x + 12| = 183x + 12 = 18 or 3x + 12 = -183x = 18 - 12 or 3x = -18 - 123x = 6 or 3x = -30x = 6/3 or x = -30/3x = 2 or x = -10