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(6/7)*x-(4/5) = 5*x+3/2 // - 5*x+3/2
(6/7)*x-(5*x)-(4/5)-(3/2) = 0
(6/7)*x-5*x-4/5-3/2 = 0
-29/7*x-23/10 = 0 // + 23/10
-29/7*x = 23/10 // : -29/7
x = 23/10/(-29/7)
x = -161/290
x = -161/290
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