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(3*x)/5-(1/2) = x-(2/5) // - x-(2/5)
(3*x)/5-x-(1/2)+2/5 = 0
(3*x)/5-x-1/2+2/5 = 0
-2/5*x-1/10 = 0 // + 1/10
-2/5*x = 1/10 // : -2/5
x = 1/10/(-2/5)
x = -1/4
x = -1/4
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