If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
8-(2*x) = 0
8-(2*x) = 0
8-(2*x) = 0
8-2*x = 0
8-2*x = 0 // - 8
-2*x = -8 // : -2
x = -8/(-2)
x = 4
x in (-oo:4) U (4:+oo)
(2*x)/(8-(2*x)) = 0.5 // - 0.5
(2*x)/(8-(2*x))-0.5 = 0
(2*x)/(8-2*x)-0.5 = 0
(2*x)/(8-2*x)+(-0.5*(8-2*x))/(8-2*x) = 0
2*x-0.5*(8-2*x) = 0
3*x-4 = 0
(3*x-4)/(8-2*x) = 0
(3*x-4)/(8-2*x) = 0 // * 8-2*x
3*x-4 = 0
3*x-4 = 0 // + 4
3*x = 4 // : 3
x = 4/3
x = 4/3
| 1/w=-1 | | f(x)=x^2-11x+24 | | 172=27+63x | | 100-35= | | 8x+5x+3+8=3x+4+9x | | -3y+5=2y-20 | | 324*17= | | (28b-7)-9(3b+4)=-2 | | 6xy+9x= | | -6(4a-3)+4a=158 | | 17x+46=98 | | 3x*4y=12 | | 0.5y-2.5-0.8y=7.4 | | xy-yz+3xz=10 | | 1/3×16/5×5/9-16/5×x/9 | | 16L+75=94 | | 8/3=x-4/3 | | xy-yx+3xz=10 | | x-12=2(x+12) | | u=ln(x^2+y^2) | | x^2+3*x-sin(x)=100 | | x-12=2x+24 | | r+-6r^2=-1 | | 2+x-3=-4x+20 | | -12+3x+4=-12+8 | | 3x+6=7x | | -12+3x+4=12-8 | | -12+3x+4=8-12 | | 23/5=x | | 41-3/2x7 | | 4x-3+3=12+3 | | 2x*(210-2x^2)=0 |