If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
2/x = 4 // - 4
2/x-4 = 0
2*x^-1 = 4 // : 2
x^-1 = 2
-1 < 0
1/(x^1) = 2 // * x^1
1 = 2*x^1 // : 2
1/2 = x^1
x = 1/2
x = 1/2
| 0=2x+1+x-4 | | Y+8.1=20 | | x+10-22=8 | | 4x+7=1-2x | | 9x+4=x+36 | | 12x+32=6+x | | 5-8x=0 | | 7x-10=6+5x | | (1+bx)(1+6ax)=1+20x+171x^2 | | -4c+6u=6 | | 29/87 | | 9m/11=18 | | 51-2x=9-8x | | 69+(2x-1)=90 | | 8x-2+4x+10=3+2x+x+20 | | 12x+25=3x+151 | | 2x+12=3x-12 | | X-x-10=0 | | x^2-2*x+y-4*y+5=0 | | 2+12=3-27 | | x+70=x^3-39x+70 | | 2x-3+4x-5= | | x^3-39+70=o | | 2(3b+7)=4 | | (x/3)*x=6250 | | 4+3x=-8+x | | 19-5x=7-8x | | 5/9*18= | | 5(wx-v)=9(x+v) | | 3x+6=18-3x | | 62=8m+6 | | X^2-62x+672= |