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