Tentukan himpunan penyelesaian dari persamaan 1. |4x -1| = 3 2. |x-3| = 6 3. |6n+1|= 1/2 4. |2/3a-9|=18

1. 4x = 3+1
4x = 4
x = 4/4 = 1
2. x = 6+3 = 9
x = 9
3. 6n = 1/2 - 1
6n = -1/2
n = -1/12
4. 2/3 a = 18+9
2/3 a = 27
a = 81/2 = 40 1/2