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D( x )
2*x-3 = 0
x-3 = 0
2*x-3 = 0
2*x-3 = 0
2*x-3 = 0 // + 3
2*x = 3 // : 2
x = 3/2
x-3 = 0
x-3 = 0
x-3 = 0 // + 3
x = 3
x in (-oo:3/2) U (3/2:3) U (3:+oo)
2/(x-3) = 5/(2*x-3) // - 5/(2*x-3)
2/(x-3)-(5/(2*x-3)) = 0
2/(x-3)-5*(2*x-3)^-1 = 0
2/(x-3)-5/(2*x-3) = 0
(2*(2*x-3))/((x-3)*(2*x-3))+(-5*(x-3))/((x-3)*(2*x-3)) = 0
2*(2*x-3)-5*(x-3) = 0
9-x = 0
(9-x)/((x-3)*(2*x-3)) = 0
(9-x)/((x-3)*(2*x-3)) = 0 // * (x-3)*(2*x-3)
9-x = 0
9-x = 0 // - 9
-x = -9 // * -1
x = 9
x = 9
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