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4/5-x = (-1/8)*x+7/5 // - (-1/8)*x+7/5
4/5-x-((-1/8)*x)-(7/5) = 0
(1/8)*x-x+4/5-7/5 = 0
-7/8*x-3/5 = 0 // + 3/5
-7/8*x = 3/5 // : -7/8
x = 3/5/(-7/8)
x = -24/35
x = -24/35
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