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)
20/20 = 10/x // - 10/x
20/20-(10/x) = 0
20/20-10*x^-1 = 0
-10*x^-1 = -1 // : -10
x^-1 = 1/10
-1 < 0
1/(x^1) = 1/10 // * x^1
1 = 1/10*x^1 // : 1/10
10 = x^1
x = 10
x = 10
| 20/20=10x | | -130x-50+160=10(5x+9) | | y=-8x^4+72x^2 | | 20/x=10=x | | -7x-9i=-9+8yi | | H=-16t^2-45t+500 | | 1/5(5x-20)=2x-5 | | 1*5b-4=-18 | | (1-4x)/2 | | y=25x+3 | | x^2+0.25x^2= | | -6x+18=66 | | 4/5x=18/25 | | 1/50=5.5/x | | 2+12=17 | | -6+18=66 | | 16x+4-4x=12x+6 | | 2x-1y+3z= | | 22x-9+x=6 | | y=(x-3)(x+2)(x-2) | | -4(w-19)=4 | | e+2+3=4 | | 5/7=(x-2)/4 | | 2a-10=14 | | 3x^2-4=-x^4 | | 3x+42=-6 | | 3(h-4)=0 | | 5/7=x-2/4 | | 12z=13z+18 | | f(x)=0.25(x+1)(x+2)(x-1) | | -4x+12y=20 | | X+55=0 |