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(3/4)*(2*x-2) = 12 // - 12
(3/4)*(2*x-2)-12 = 0
3/4*(2*x-2)-12 = 0
3/4*(2*x-2)-12 = 0
3/2*x-27/2 = 0
3/2*x-27/2 = 0
3/2*x-27/2 = 0 // + 27/2
3/2*x = 27/2 // : 3/2
x = 27/2/3/2
x = 9
x = 9
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