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x in (-oo:+oo)
7/8 = (3/4)*x // - (3/4)*x
7/8-((3/4)*x) = 0
(-3/4)*x+7/8 = 0
7/8-3/4*x = 0 // - 7/8
-3/4*x = -7/8 // : -3/4
x = -7/8/(-3/4)
x = 7/6
x = 7/6
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