Tentukan penyelesaian dan persamaan berikut a. 2 I 3 x + 1 I = 5

x ≥ 0
3x + 1 = 5/2
3x = 5/2 - 1
3x = 3/2
x = 3/2×3
x = 3/6 = ½
x < 0
-3x - 1 = 5/2
-3x = 5/2 + 1
-3x = 7/2
x = 7/2×-3
x = 7/-6
x = -7/6