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D( x )
3*x-4 = 0
x+5 = 0
3*x-4 = 0
3*x-4 = 0
3*x-4 = 0 // + 4
3*x = 4 // : 3
x = 4/3
x+5 = 0
x+5 = 0
x+5 = 0 // - 5
x = -5
x in (-oo:-5) U (-5:4/3) U (4/3:+oo)
5/(3*x-4) = 2/(x+5) // - 2/(x+5)
5/(3*x-4)-(2/(x+5)) = 0
5/(3*x-4)-2*(x+5)^-1 = 0
5/(3*x-4)-2/(x+5) = 0
(5*(x+5))/((3*x-4)*(x+5))+(-2*(3*x-4))/((3*x-4)*(x+5)) = 0
5*(x+5)-2*(3*x-4) = 0
33-x = 0
(33-x)/((3*x-4)*(x+5)) = 0
(33-x)/((3*x-4)*(x+5)) = 0 // * (3*x-4)*(x+5)
33-x = 0
33-x = 0 // - 33
-x = -33 // * -1
x = 33
x = 33
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