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D( x )
x-5 = 0
2*x = 0
x-5 = 0
x-5 = 0
x-5 = 0 // + 5
x = 5
2*x = 0
2*x = 0
2*x = 0 // : 2
x = 0
x in (-oo:0) U (0:5) U (5:+oo)
4/(x-5) = 3/(2*x) // - 3/(2*x)
4/(x-5)-(3/(2*x)) = 0
4/(x-5)+(-3/2)*x^-1 = 0
4/(x-5)-3/(2*x) = 0
(2*4*x)/(2*x*(x-5))+(-3*(x-5))/(2*x*(x-5)) = 0
2*4*x-3*(x-5) = 0
5*x+15 = 0
(5*x+15)/(2*x*(x-5)) = 0
(5*x+15)/(2*x*(x-5)) = 0 // * 2*x*(x-5)
5*x+15 = 0
5*x+15 = 0 // - 15
5*x = -15 // : 5
x = -15/5
x = -3
x = -3
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