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(3/4)*(4*x-8) = 63 // - 63
(3/4)*(4*x-8)-63 = 0
3/4*(4*x-8)-63 = 0
3/4*(4*x-8)-63 = 0
3*x-69 = 0
3*x-69 = 0
3*x-69 = 0 // + 69
3*x = 69 // : 3
x = 69/3
x = 23
x = 23
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