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-4 < 3 - 2x < 4
-4 -3 < - 2x < 4 -3
-7 < -2x < 1
-7/-2 > x > 1/-2
7/2 > x > -1/2 → tandanya dibalik karena pembaginya negatif
Hp { 7/2 > x > -1/2 }
b)
c)