Tentukan nilai mutlak berikut (2x + 5) < 7

| 2x + 5 | < 7
-7 < 2x + 5 < 7
-7 - 5 < 2x < 7 - 5
-12 < 2x < 2
-6 < x < 1

Pertidaksamaan Mutlak

|2x + 5| < 7
2x + 5 < 7
2x < 2
x < 1

|2x + 5| > -7
2x + 5 > -7
2x > -12
x > -6

HP = {x| -6 < x < 1, x € R}