Jawab dong,20 pointt

2x + 6 = 15
2x = 9
x = 4,5

2x - 5 = 21
2x = 26
x = 13

2x + 8 = 4x - 2
2x = 10
x = 5

5x - 12 = 3x + 20
2x = 32
x = 16

4x - 5 <= x + 4
3x <= 9
x <= 3
HP = {... , 0, 1, 2, 3}

5x + 8 <= 17 + 2x
3x <= 9
x <= 3
HP = {... , 0, 1, 2, 3}