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D( x )
x-2 = 0
x-2 = 0
x-2 = 0
x-2 = 0 // + 2
x = 2
x in (-oo:2) U (2:+oo)
5/(x-2) = 15/27 // - 15/27
5/(x-2)-(15/27) = 0
5/(x-2)-5/9 = 0
(5*9)/(9*(x-2))+(-5*(x-2))/(9*(x-2)) = 0
5*9-5*(x-2) = 0
55-5*x = 0
(55-5*x)/(9*(x-2)) = 0
(55-5*x)/(9*(x-2)) = 0 // * 9*(x-2)
55-5*x = 0
55-5*x = 0 // - 55
-5*x = -55 // : -5
x = -55/(-5)
x = 11
x = 11
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