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 = 50 // - 50
20/x-50 = 0
20*x^-1 = 50 // : 20
x^-1 = 5/2
-1 < 0
1/(x^1) = 5/2 // * x^1
1 = 5/2*x^1 // : 5/2
2/5 = x^1
x = 2/5
x = 2/5
| -3*1+10y=-30 | | a(2a+9)+9= | | 125n=25 | | 8.3x+13=112.6 | | m/4+m/5=18 | | x+60x=38 | | 7k+8.5=k+13 | | 5(4x-2)+5(18-3x)=2(2x+4)-5 | | y=6/5*1-6 | | y=6/5*0-6 | | 2y-5x=1 | | 180=x+40 | | -6y+8x-7n= | | 8.95x+36=80.1025+6x | | 2x-5y=-12 | | -[3z-(14z+3)]=3+(10z+8) | | x+(x+23)+(x+25)=84 | | 1/5x=52 | | 3*4-2y=-8 | | (12X2)/4+10-6 | | 16x+12=8x+33 | | 4*5-2y=-8 | | 160.5+3.30=y | | -[8z-(12z+6)]=6+(3z+2) | | 10y-3=-6+3y | | -5f+8= | | 30x+21=-45x-6 | | 5.8(x-1)=-0.2x+24.2 | | 84=x+25 | | 5.35X+2.15Y=300 | | 1/5(x-15)=4/5 | | 84=x+23 |