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)
6/10 = 20/x // - 20/x
6/10-(20/x) = 0
6/10-20*x^-1 = 0
-20*x^-1 = -3/5 // : -20
x^-1 = 3/100
-1 < 0
1/(x^1) = 3/100 // * x^1
1 = 3/100*x^1 // : 3/100
100/3 = x^1
x = 100/3
x = 100/3
| 4=-9(0)+b | | -13x=39x^2 | | -4(5y-7)+2(4y+6)=m | | -4*5=m | | 7/9=5/x | | 1/6=x/48 | | 7/x=35/50 | | 2x/3+19/9=x/6 | | k+5k= | | k*5k= | | 3x+0=2 | | 5/8=x/24 | | ((b^2)/(-2a^4))^3 | | -9-(-8)=m | | 3x+14=0520 | | 2-3-2+3=m | | 5y-3y-7y+7y=m | | 0-8=m | | -20-(-14)=m | | -19-(-18)=m | | -119-7=8x+16 | | 16t^2=1085 | | 16t^2=975 | | 4(6-3)-8=m | | 2*2*2=m | | 3*3*3=m | | 7(9+7)+4(4-1)=m | | x+4*0=0 | | 0-3=m | | -3-0=m | | 0-8y=16 | | 4x-8*0=16 |