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5*x+3/5 = 7*x-(67/5) // - 7*x-(67/5)
5*x-(7*x)+3/5+67/5 = 0
5*x-7*x+3/5+67/5 = 0
14-2*x = 0 // - 14
-2*x = -14 // : -2
x = -14/(-2)
x = 7
x = 7
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