Persamaan nilai mutlak linear satu variabel |2x+16|=|x+4|

positif

2X+16 = X+4 | X = -12

negatif

-2X-16 = X+4 | x = 4

2x+16 = x+4
2x-x = 4-16
x = -12

2x+16 = -(x+4)
2x+16 =-x-4
2x+x = -4-16
3x = -20
x= -20/3
x= -6 2/3

HP = {-12,6 2/3}