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D( x )
5*x+2 = 0
5*x+3 = 0
5*x+2 = 0
5*x+2 = 0
5*x+2 = 0 // - 2
5*x = -2 // : 5
x = -2/5
5*x+3 = 0
5*x+3 = 0
5*x+3 = 0 // - 3
5*x = -3 // : 5
x = -3/5
x in (-oo:-3/5) U (-3/5:-2/5) U (-2/5:+oo)
(2*x+5)/(5*x+3)-((2*x+1)/(5*x+2)) = 0
(2*x+5)/(5*x+3)+(-1*(2*x+1))/(5*x+2) = 0
((2*x+5)*(5*x+2))/((5*x+3)*(5*x+2))+(-1*(2*x+1)*(5*x+3))/((5*x+3)*(5*x+2)) = 0
(2*x+5)*(5*x+2)-1*(2*x+1)*(5*x+3) = 0
18*x+7 = 0
(18*x+7)/((5*x+3)*(5*x+2)) = 0
(18*x+7)/((5*x+3)*(5*x+2)) = 0 // * (5*x+3)*(5*x+2)
18*x+7 = 0
18*x+7 = 0 // - 7
18*x = -7 // : 18
x = -7/18
x = -7/18
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