tolong kerjakan |4 - 2/5x| - 7 = 13

Materi : Persamaan Mutlak

Pembahasan :
|4 - 2/5x| = 20

4 - 2/5x = 20
2/5x = 4 - 20
2/5x = -16
2x = -80
x = -40

4 - 2/5x = -20
2/5x = 4 + 20
2/5x = 24
x = 60

Hp : {-40 , 60}