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1. 3 < 2x - 5
atau
2. 2x - 5 < 7
1. = 3 < 2x - 5
= 3 + 5 < 2x
= 8 < 2x
= 4 < x
2. = 2x - 5 < 7
= 2x < 12
= x < 6
dari 1 dan 2, di dapat 4 < x < 6 (b)
1.3<2x-5
8<2x
42. 2x-5<7
2x<12
x<6
jadi jawaban yang paling benar adalah 4