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(4/7)*x+2 = (4/5)*x+2/5 // - (4/5)*x+2/5
(4/7)*x-((4/5)*x)-(2/5)+2 = 0
(4/7)*x+(-4/5)*x-2/5+2 = 0
8/5-8/35*x = 0 // - 8/5
-8/35*x = -8/5 // : -8/35
x = -8/5/(-8/35)
x = 7
x = 7
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