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(3*x^1)/2-((16*x^1)/4)-12 = 0
(3*x)/2-4*x-12 = 0
-5/2*x-12 = 0 // + 12
-5/2*x = 12 // : -5/2
x = 12/(-5/2)
x = -24/5
x = -24/5
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