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4x-8 < 1/2
4x < 8 1/2
4x < 17/2
x< 17/8 → 2<x<17/8...(1)
Bila x ≤ 2
8-4x < 1/2
7 1/2 < 4x
15/2 < 4x
15/8 < x
x > 15/8 → 15/8<x≤2...(2)
Dari (1) dan (2), diperoleh 15/8<x<17/8