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)
1/x = 3/x-4 // - 3/x-4
1/x-(3/x)+4 = 0
1/x-3*x^-1+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
| X^2+2X-8Y+32=0 | | 9=v^(2/3 | | (x+7)*2+4=52 | | 4/x=x/3x=16 | | 3x+(-3y)(4x)+y= | | p-19+ -124= -113 | | 9/10-2/15 | | 988=-26(j+791) | | 4[y+2]=16 | | 4[y/2]=16 | | (xy-4)/5=-2 | | 2x+3x-2(4)=0 | | 1/4(8x-4)=x | | 13+(-15x)= | | 7=6x-3 | | 3r-7s=-13 | | 6x/7x | | -2y+22=-8(y-8) | | x^2+6x-391=0 | | 5x=2X+X | | x+2(4)-5=0 | | 15=y+47 | | 10x-4x+8=12x+7x+21 | | 6+-2x=6x+-10x+12 | | 6+10x=-30+y | | 5(x+7)-31= | | 2x+1=3x-y | | 75/x^2=3 | | R(x)=37x | | 9n-19=2n+107 | | f(x)=7x^2+5x-9 | | f(x)=7x^2+5x+9 |