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(4*x^1)/10 = 3*x+4/5 // - 3*x+4/5
(4*x^1)/10-(3*x)-(4/5) = 0
(4*x)/10-3*x-4/5 = 0
-13/5*x-4/5 = 0 // + 4/5
-13/5*x = 4/5 // : -13/5
x = 4/5/(-13/5)
x = -4/13
x = -4/13
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