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4*x-(8/6) = 5*x-(5/7) // - 5*x-(5/7)
4*x-(5*x)-(8/6)+5/7 = 0
4*x-5*x-4/3+5/7 = 0
-x-13/21 = 0 // + 13/21
-x = 13/21 // * -1
x = -13/21
x = -13/21
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