nilai mutlak 2x-1 sama dengan 7

Bab Nilai Mutlak
Matematika SMA Kelas X

|2x - 1| = 7

2x - 1 = 7
2x = 7 + 1
x = 8/2
x = 4

2x - 1 = - 7
2x = -7 + 1
x = -6/2
x = -3

HP = {-3, 4}