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D( x )
2-x = 0
x-3 = 0
2-x = 0
2-x = 0
2-x = 0 // - 2
-x = -2 // * -1
x = 2
x-3 = 0
x-3 = 0
x-3 = 0 // + 3
x = 3
x in (-oo:2) U (2:3) U (3:+oo)
3/(x-3) = 2/(2-x) // - 2/(2-x)
3/(x-3)-(2/(2-x)) = 0
3/(x-3)-2*(2-x)^-1 = 0
3/(x-3)-2/(2-x) = 0
(3*(2-x))/((x-3)*(2-x))+(-2*(x-3))/((x-3)*(2-x)) = 0
3*(2-x)-2*(x-3) = 0
12-5*x = 0
(12-5*x)/((x-3)*(2-x)) = 0
(12-5*x)/((x-3)*(2-x)) = 0 // * (x-3)*(2-x)
12-5*x = 0
12-5*x = 0 // - 12
-5*x = -12 // : -5
x = -12/(-5)
x = 12/5
x = 12/5
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