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x in (-oo:+oo)
8/9 = (2*x)/18 // - (2*x)/18
8/9-((2*x)/18) = 0
(-1/9)*x+8/9 = 0
8/9-1/9*x = 0 // - 8/9
-1/9*x = -8/9 // : -1/9
x = -8/9/(-1/9)
x = 8
x = 8
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