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-4 = 0
x-4 = 0
x-4 = 0
x-4 = 0 // + 4
x = 4
x in (-oo:4) U (4:+oo)
9 = 6/(x-4) // - 6/(x-4)
9-(6/(x-4)) = 0
9-6*(x-4)^-1 = 0
9-6/(x-4) = 0
(9*(x-4))/(x-4)-6/(x-4) = 0
9*(x-4)-6 = 0
9*x-42 = 0
(9*x-42)/(x-4) = 0
(9*x-42)/(x-4) = 0 // * x-4
9*x-42 = 0
9*x-42 = 0 // + 42
9*x = 42 // : 9
x = 42/9
x = 14/3
x = 14/3
| 16=x/(x-4) | | 2x+116=-6x+8-x | | z-5/7=-3 | | (2x^2)/8=81 | | 4x^2+4x-63=0 | | 4(4x-3)-2(3x-5)=4x+13 | | 2x^2/8 | | 32=-3x/6 | | 4cos^2x+2sinx-1=0 | | -30x^2+700x+2100=0 | | A/7-11=17 | | 7x+5=-11+3x | | 4cos^2x+sinx-1=0 | | f(x)=-6x^2+2x+8 | | -3x^2+3x-1=0 | | 1175=20x+35y | | -42=6(v+2) | | 5x-6y=-28 | | (7x+8)+(-8+4)= | | 3/5b=7/5 | | x^2+4x-12 =0 | | 11/4-2/3 | | 3x-(5x-21)=6x+(9-4x) | | =ln(11-2x) | | 2=8/6x | | 4x^2+8x+16y^2-32Y=44 | | 4x^3-150x^2+900x=0 | | 13/14x=286 | | 4a+b=175 | | X^2+2x+y^2-10y=55 | | x^2-2x-35 =0 | | -(x)-6=5 |