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x in (-oo:+oo)
22/18 = x/81 // - x/81
22/18-(x/81) = 0
11/9-1/81*x = 0 // - 11/9
-1/81*x = -11/9 // : -1/81
x = -11/9/(-1/81)
x = 99
x = 99
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