|3x+9|kurang dari sama dengan|5x-10|

|3x+9| <= |5x-10|
3x+9 >= -(5x-10)
3x+9 >= -5x + 10
3x+5x >= 10-9
8x >= 1
x >= 1/8

3x+9 <= 5x-10
3x-5x <= -10-9
-2x <= -19
x <= -19/-2
x <= 19/2
hp = { x| 19/2 >= x >= 1/8 }