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