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2x - 6 + 1 < 6x + 18 - 3
2x - 5 < 6x + 15
2x - 6x < 15 + 5
-4x < 20
x > 20 : (-4)
x > -5
Jadi, nilai x yang memenuhi harus lebih besar dari -5 HP{-4 , -3 , -2 ......}