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2 + 11/b = 15/2
4b + 22 = 15b
4b - 15b = -22
-11b = -22
b = 2
Himpunan Penyelesaian = {2}
2x - 6 ≥ 8x + 5
2x - 8x ≥ 5 + 6
-6x ≥ 11
x ≤ -11/6
Himpunan Penyelesaian = {-11/6, -2, -3, ...}
1/2x + 5 ≥ 15
1 + 10x ≥ 30x
10x - 30x ≥ -1
-20x ≥ -1
x ≤ 1/20
Himpunan Penyelesaian = {1/20, 0, -1, ...}
1. 2 + = 7 ⇒ 7 =
------------------------------------------x b
2b + 11 =
4b² + 22b = 15b
4b² + 22b - 15b = 0
4b² + 7b = 0
b (4b + 7) = 0
(b = 0) atau (b = -)
Jadi, HP (0 , -)
Pertidaksamaan
1. 2x - 6 ≥ 8x + 5
2x - 8x ≥ 5 + 6
-6x ≥ 11
x ≥ -
Jadi, HP (x ≥ -)
2. x +5 ≥ 15
x ≥ 15 - 5
x ≥ 10
x ≥
x ≥ 10.2
x ≥ 20
Jadi, HP (x ≥ 20)