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9*x-(5/7) = 5 // - 5
9*x-(5/7)-5 = 0
9*x-5/7-5 = 0
9*x-40/7 = 0 // + 40/7
9*x = 40/7 // : 9
x = 40/7/9
x = 40/63
x = 40/63
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