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