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5*x+7 = x+53/5 // - x+53/5
5*x-x-(53/5)+7 = 0
5*x-x-53/5+7 = 0
4*x-18/5 = 0 // + 18/5
4*x = 18/5 // : 4
x = 18/5/4
x = 9/10
x = 9/10
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