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(3/5)*(2*x-8) = 12 // - 12
(3/5)*(2*x-8)-12 = 0
3/5*(2*x-8)-12 = 0
3/5*(2*x-8)-12 = 0
6/5*x-84/5 = 0
6/5*x-84/5 = 0
6/5*x-84/5 = 0 // + 84/5
6/5*x = 84/5 // : 6/5
x = 84/5/6/5
x = 14
x = 14
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