If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
6-x = 0
6-x = 0
6-x = 0
6-x = 0 // - 6
-x = -6 // * -1
x = 6
x in (-oo:6) U (6:+oo)
y = 2/(6-x) // - 2/(6-x)
y-(2/(6-x)) = 0
y-2*(6-x)^-1 = 0
y-2/(6-x) = 0
(y*(6-x))/(6-x)-2/(6-x) = 0
y*(6-x)-2 = 0
6*y-(x*y)-2 = 0
(6*y-(x*y)-2)/(6-x) = 0
(6*y-(x*y)-2)/(6-x) = 0 // * 6-x
6*y-(x*y)-2 = 0
x*(-y)+6*y-2 = 0 // - 6*y-2
x*(-y) = -(6*y-2) // : -y
x = (-(6*y-2))/(-y)
x = -(y^-1*(2-(6*y)))
x = -(y^-1*(2-(6*y)))
| x-5(x-8)=4 | | -3(-x+1)-4x-5=-11 | | x/12=3/x | | 32=6(U+8)-8U | | 2/9.4=0.2/v | | (6x^2)+12x+156=0 | | 4200=200x-2x^2 | | 9z+-10=10z+20 | | 13x-(-5)=70 | | -4=-4x-3(-4x+4) | | 40x^3-24x^2+35x-21=0 | | 0.25(8x+16)=6x+12 | | 16x-0=2 | | 2100=x-x^2 | | x^2+2x+1=.4 | | 6x+12x+156=0 | | 3x+4y+90=180 | | 5x+8=-93 | | 3x=2(2+2y) | | Q+-8=-10 | | 69/4=1/2x | | 2(3y-4)=3(y-.67) | | 180n-360=168n | | 16/7=x/9 | | Z+-5=2 | | 7x+2x+13x+90=180 | | y=90x+200 | | x=f(x+2)-[f(5x^2+7)+2] | | 9/4y−12=1/4y−4 | | X+3y=-65 | | 4x-2=6.3 | | y=-3(3)-3 |