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x in (-oo:+oo)
x-(3*x)-(2/4)-(1/8) = x/2 // - x/2
x-(3*x)-(x/2)-(2/4)-(1/8) = 0
x-3*x-(x/2)-1/2-1/8 = 0
-5/2*x-5/8 = 0 // + 5/8
-5/2*x = 5/8 // : -5/2
x = 5/8/(-5/2)
x = -1/4
x = -1/4
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