tentukan himpunan penyelesaian dari persamaan 3.|2x+3|-7=-4

Bab Nilai Mutlak
Matematika SMA Kelas X

3 . |2x + 3| - 7 = -4
3 . |2x + 3| = 7 - 4
|2x + 3| = 3/3
|2x + 3| = 1

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

2x + 3 = -1
2x = -1 - 3
x = -4 / 2
x = -2

HP = { -2, -1 }