Tugas Pertidaksamaan

TUGAS

1. 2x + 3 > 7
Penyelesaian
2x + 3 > 7
2x > 7 - 3
2x > 4
x > 4/2
x > 2
HP = {x | x > 2}

2. 3 - 2x <= -5
penyelesaian
3 - 2x <= -5
-2x <= -5 - 3
-2x <= -8
x <= -8/-2
x <= 4
HP = {x | x <= 4}

3. 3x + 5 <= -x + 13
penyelesaian
3x + x <= -x + 13
3x + x <= 13 - 5
4x <= 8
x <= 8/4
x <= 2
HP = {x | x <= 2}