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x in (-oo:+oo)
2/11 = x/9 // - x/9
2/11-(x/9) = 0
2/11-1/9*x = 0 // - 2/11
-1/9*x = -2/11 // : -1/9
x = -2/11/(-1/9)
x = 18/11
x = 18/11
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