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5/7 = 125*x // - 125*x
5/7-(125*x) = 0
5/7-125*x = 0
5/7-125*x = 0 // - 5/7
-125*x = -5/7 // : -125
x = -5/7/(-125)
x = 1/175
x = 1/175
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