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)
10/x = 200 // - 200
10/x-200 = 0
10*x^-1 = 200 // : 10
x^-1 = 20
-1 < 0
1/(x^1) = 20 // * x^1
1 = 20*x^1 // : 20
1/20 = x^1
x = 1/20
x = 1/20
| x^2+11x+28=8 | | 3+x=2x-5 | | 344=x^2+2x | | x-3+9=2x-5 | | -39=b-54 | | y=16t^2+8t+30 | | (4e*4e)+5e=6 | | 2x+6+8=X+14 | | 34-27=9 | | x-7+10=2x-7 | | 9(-2x)=2(10-8x) | | 15e+9=180 | | 9+x+4=4x-5 | | 13e+102=180 | | 114+3e=180 | | 3+2x+33=x+24 | | 105+(4e+3)=180 | | 7=8-3d | | 11x+7x-1=17 | | 2x(x^2-7x+10)-(4x-20)=x-1(x^2-7x+10) | | 2(2+y)+y=13 | | Sin^2x=2-2cosx | | 7+21+2x=x+19 | | x+20+x+22=20 | | 3(7+4y)-y=-5 | | 5y=160+9y | | 2x+27+10=x+26 | | 8+6=4814 | | 5-r+12-r=13 | | 40+3x-x^2=0 | | 19x-3x^2=-14 | | 9+1=910 |