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