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7*x = (2*x-71)/23 // - (2*x-71)/23
7*x-((2*x-71)/23) = 0
(-1*(2*x-71))/23+7*x = 0
(-1*(2*x-71))/23+(7*23*x)/23 = 0
7*23*x-1*(2*x-71) = 0
159*x+71 = 0
(159*x+71)/23 = 0
(159*x+71)/23 = 0 // * 23
159*x+71 = 0
159*x+71 = 0 // - 71
159*x = -71 // : 159
x = -71/159
x = -71/159
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