Tentukan nilai x yg memenuhi persamaan:
|x-2|+|3x-9|=7
|x-2|+|3x-9|=7
|x|+|3x| = 7 + 2 +9
|4x| = 18
|x| =18/4
x = 4
1 x-2+3x-9 = 7
4x = 18
x = 18/4 = 9/2 = 4 1/2
2. x-2 + 3x-9 = -7
4x = 4
x = 1