himpunan 3| 2x -5 |-2≤ 10

3|2x-5| - 2 ≤ 10
3|2x-5| ≤ 12
|2x-5| ≤ 4

I... 2x-5 ≤ 4
2x ≤ 9
x ≤ 4/5

II... 2x-5 ≥ -4
 2x ≥ 1
x ≥ 1/2

HP = {1/2 ≤ x ≤ 4/5}