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-5x + 20 < 18 - 6x
-5x + 6x < 18 - 20
x < - 2
hp : {-3, -4, -5,...}
smoga membantu
3x + 18 -8x + 2 < 18 - 6x
3x + 6x - 8x < 18 - 18 - 2
hp (x < -2)