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(3/4)*(4*x-8) = 18 // - 18
(3/4)*(4*x-8)-18 = 0
3/4*(4*x-8)-18 = 0
3/4*(4*x-8)-18 = 0
3*x-24 = 0
3*x-24 = 0
3*x-24 = 0 // + 24
3*x = 24 // : 3
x = 24/3
x = 8
x = 8
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