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(3/4)*(8*x-12) = 3 // - 3
(3/4)*(8*x-12)-3 = 0
3/4*(8*x-12)-3 = 0
3/4*(8*x-12)-3 = 0
6*x-12 = 0
6*x-12 = 0
6*x-12 = 0 // + 12
6*x = 12 // : 6
x = 12/6
x = 2
x = 2
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