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D( x )
x-2 = 0
x-22 = 0
x-2 = 0
x-2 = 0
x-2 = 0 // + 2
x = 2
x-22 = 0
x-22 = 0
x-22 = 0 // + 22
x = 22
x in (-oo:2) U (2:22) U (22:+oo)
2/(x-22) = 5/(x-2) // - 5/(x-2)
2/(x-22)-(5/(x-2)) = 0
2/(x-22)-5*(x-2)^-1 = 0
2/(x-22)-5/(x-2) = 0
(2*(x-2))/((x-22)*(x-2))+(-5*(x-22))/((x-22)*(x-2)) = 0
2*(x-2)-5*(x-22) = 0
106-3*x = 0
(106-3*x)/((x-22)*(x-2)) = 0
(106-3*x)/((x-22)*(x-2)) = 0 // * (x-22)*(x-2)
106-3*x = 0
106-3*x = 0 // - 106
-3*x = -106 // : -3
x = -106/(-3)
x = 106/3
x = 106/3
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