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(3/5)*(2*x-4) = 6 // - 6
(3/5)*(2*x-4)-6 = 0
3/5*(2*x-4)-6 = 0
3/5*(2*x-4)-6 = 0
6/5*x-42/5 = 0
6/5*x-42/5 = 0
6/5*x-42/5 = 0 // + 42/5
6/5*x = 42/5 // : 6/5
x = 42/5/6/5
x = 7
x = 7
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