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X in (-oo:+oo)
X/(-8) = 6/9 // - 6/9
X/(-8)-(6/9) = 0
X/(-8)-2/3 = 0
-1/8*X-2/3 = 0 // + 2/3
-1/8*X = 2/3 // : -1/8
X = 2/3/(-1/8)
X = -16/3
X = -16/3
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