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8*x-12 = 4*(1/2)*x-6 // - 4*(1/2)*x-6
8*x-(4*(1/2)*x)-12+6 = 0
8*x-2*x-12+6 = 0
6*x-6 = 0 // + 6
6*x = 6 // : 6
x = 6/6
x = 1
x = 1
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