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(2*x)/5 = x+12/10 // - x+12/10
(2*x)/5-x-(12/10) = 0
(2*x)/5-x-6/5 = 0
-3/5*x-6/5 = 0 // + 6/5
-3/5*x = 6/5 // : -3/5
x = 6/5/(-3/5)
x = -2
x = -2
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