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7x + 8x < 22 + 8
15x < 30
x < 30/15
x < 2
maka Hp : { x | x < 2, x ∈ Real }
Semoga membantu.
7x - 9 < 22 - 8x
7x + 8x < 22 + 9
15x < 31
x < 31/15
x < 2,067
Maka HP {xI x < 2, x Bil Real)