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x in (-oo:+oo)
x/3-(2/5) = x/2 // - x/2
x/3-(x/2)-(2/5) = 0
x/3-(x/2)-2/5 = 0
-1/6*x-2/5 = 0 // + 2/5
-1/6*x = 2/5 // : -1/6
x = 2/5/(-1/6)
x = -12/5
x = -12/5
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