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D( x )
x-5 = 0
2*x-10 = 0
x-5 = 0
x-5 = 0
x-5 = 0 // + 5
x = 5
2*x-10 = 0
2*x-10 = 0
2*x-10 = 0 // + 10
2*x = 10 // : 2
x = 10/2
x = 5
x in (-oo:5) U (5:+oo)
5/(2*x-10) = -6/(x-5) // + -6/(x-5)
5/(2*x-10)-(-6/(x-5)) = 0
5/(2*x-10)+6*(x-5)^-1 = 0
5/(2*x-10)+6/(x-5) = 0
(5*(x-5))/((2*x-10)*(x-5))+(6*(2*x-10))/((2*x-10)*(x-5)) = 0
5*(x-5)+6*(2*x-10) = 0
17*x-85 = 0
(17*x-85)/((2*x-10)*(x-5)) = 0
(17*x-85)/((2*x-10)*(x-5)) = 0 // * (2*x-10)*(x-5)
17*x-85 = 0
17*x-85 = 0 // + 85
17*x = 85 // : 17
x = 85/17
x = 5
x in { 5}
x belongs to the empty set
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