pertidaksamaan 2x-3 ≤ 4x+5 < x+47 dipenuhi oleh... a. -4 ≤ x ≤ 14 b. -4 < x < 14 c. 4 ≤ x ≤ 14 d. x < 4 atau x > 14 e. x ≤ 4 atau x > 14

2x - 3 ≤ 4x + 5 < x + 47
1) 2x - 3 ≤ 4x + 5
2x - 4x ≤ 5 + 3
-2x ≤ 8
2x ≥ -8
x ≥ -4

2) 2x - 3 < x + 47
2x - x < 47 + 3
x < 50

3) 4x + 5 < x + 47
4x - x < 47 - 5
3x < 42
x < 14

Garis bilangan
....... [-4] xxxxxxxxxxxxxxxxxxxxxx
xxxxxxxxxxxxxxxxxxxx (50) .........
xxxxxxxxxxxxxx (14) ......................
-4 ≤ x < 14