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x in (-oo:+oo)
(1/4)*x-(1/8) = (1/2)*x+7/8 // - (1/2)*x+7/8
(1/4)*x-((1/2)*x)-(1/8)-(7/8) = 0
(1/4)*x+(-1/2)*x-1/8-7/8 = 0
-1/4*x-1 = 0 // + 1
-1/4*x = 1 // : -1/4
x = 1/(-1/4)
x = -4
x = -4
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