If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
2*x+1 = 0
2*x-1 = 0
2*x+1 = 0
2*x+1 = 0
2*x+1 = 0 // - 1
2*x = -1 // : 2
x = -1/2
2*x-1 = 0
2*x-1 = 0
2*x-1 = 0 // + 1
2*x = 1 // : 2
x = 1/2
x in (-oo:-1/2) U (-1/2:1/2) U (1/2:+oo)
3/(2*x-1)-(5/(2*x+1)) = 0
3/(2*x-1)-5*(2*x+1)^-1 = 0
3/(2*x-1)-5/(2*x+1) = 0
(3*(2*x+1))/((2*x-1)*(2*x+1))+(-5*(2*x-1))/((2*x-1)*(2*x+1)) = 0
3*(2*x+1)-5*(2*x-1) = 0
8-4*x = 0
(8-4*x)/((2*x-1)*(2*x+1)) = 0
(8-4*x)/((2*x-1)*(2*x+1)) = 0 // * (2*x-1)*(2*x+1)
8-4*x = 0
8-4*x = 0 // - 8
-4*x = -8 // : -4
x = -8/(-4)
x = 2
x = 2
| -4=v-(-31) | | 2y+1+4y-13=180 | | 40x^3-35x^2+24x-21=0 | | y/5+y/6=9/10 | | 10x/5+6=12 | | y=2(-1/4)^2-(1/4)-14 | | -0.4y+0.2=0.6 | | 6m-9-4m= | | 14x-9+5=13x-2 | | f(x)=25 | | 6*16+8y=48 | | y+7=31-7y | | g(x)=50 | | Y=2x^2+x-14 | | ((x+4)/(x-1))+((x^2+x)/(x-1)) | | X-49=-26 | | 10x+14=3x+91 | | 14+4(a-5)=6-2a | | 7w-6-3w+5= | | X+79=91 | | 2x^2-7x+3=3 | | p^2=54-30 | | (8x+2/3)(6x+3/2) | | x^2+5x-48=0 | | 13x+21-9x=3x+66 | | 2x^2+7x+3=3 | | x^2+5x-52=0 | | 5x-16=4x+18 | | y-35=-45 | | 3x^4+22x^2-45=0 | | -6x+59=-7x+82 | | Y-8/3=y+4/2 |