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)
20/x = 100 // - 100
20/x-100 = 0
20*x^-1 = 100 // : 20
x^-1 = 5
-1 < 0
1/(x^1) = 5 // * x^1
1 = 5*x^1 // : 5
1/5 = x^1
x = 1/5
x = 1/5
| 6x=150 | | 7*8,333...-23=4*8,333...+2 | | 9x+4y+7z-5x+4z-5y= | | -5x-9=11-6x | | 35+x=27 | | 7x/4=14 | | 7x-23=4x+2 | | 7x-23=4x | | -6=9x+3 | | 1-5x+(2+x^2)x^2=0 | | x+4.7=63 | | 30=3x-3 | | 5x+5y=260 | | 1/2+4/5 | | x*5=300 | | 1/2+24/5 | | 3x+(4x+5)=180 | | x+2x+(7x+2)=22 | | 31/2+p=51/4 | | (X+3)(x+3)=100 | | 3u=42-4u | | 5(n-3)-3=12 | | 12-1*0+4/2 | | x-9/5+1/5=-x/15 | | x/6.5=4 | | 13+7m=97 | | c^2=-6-5c | | x-16=24 | | f/8+31=37 | | 2(2+1/3)=3/2n+1/2N-1/3 | | 1014=6x^2 | | 8/15=x/6 |