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12-((3/2)*x) = 24 // - 24
12-((3/2)*x)-24 = 0
(-3/2)*x-24+12 = 0
-3/2*x-12 = 0 // + 12
-3/2*x = 12 // : -3/2
x = 12/(-3/2)
x = -8
x = -8
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