tentukan himpunan l3x-2l=lx+4l

|3x - 2| = |x + 4|
(3x - 2)^2 = (x + 4)^2
9x^2 - 12x + 4 = x^2 + 8x + 16
8x^2 - 20x - 12 = 0
2x^2 - 5x - 3 = 0
(2x + 1)(x - 3) = 0
x = -1/2 atau x = 3
HP = {-1/2, 3}