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X in (-oo:+oo)
X/(-8) = 10-9 // - 10-9
X/(-8)-10+9 = 0
-1/8*X-1 = 0 // + 1
-1/8*X = 1 // : -1/8
X = 1/(-1/8)
X = -8
X = -8
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