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3*(x-5) = 39/15 // - 39/15
3*(x-5)-(39/15) = 0
3*(x-5)-13/5 = 0
(3*5*(x-5))/5-13/5 = 0
3*5*(x-5)-13 = 0
15*x-88 = 0
(15*x-88)/5 = 0
(15*x-88)/5 = 0 // * 5
15*x-88 = 0
15*x-88 = 0 // + 88
15*x = 88 // : 15
x = 88/15
x = 88/15
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