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)
60 = 500/x // - 500/x
60-(500/x) = 0
60-500*x^-1 = 0
-500*x^-1 = -60 // : -500
x^-1 = 3/25
-1 < 0
1/(x^1) = 3/25 // * x^1
1 = 3/25*x^1 // : 3/25
25/3 = x^1
x = 25/3
x = 25/3
| 19.3x=42-1.7x | | 8w=25 | | 6+5r=r+5r | | X/3=6/3 | | y=4x+172 | | X^15=5 | | x-1.75=10.25 | | 6.9=2x/2-x | | 2x-3/3x-2=11/14 | | 6=4(v+2)-6v | | -9-4(x+3)=10x-(11x-9) | | 6x+30=-2x-2 | | 3(4p+3)+4(p-1)=53 | | -.33333333x=12 | | (6x^3y^5)/(35a^2b^4)/(12x^4y^4)/(7a^4b^4) | | 85x-25= | | (X+8)(X-3)(X+1)=0 | | 3.14r^2=78.5 | | 3(x-7)+4x=5x-(x-3) | | 72/-54= | | 4+2x+2-x=19 | | =4x^2+5x | | 9x-2x=25 | | -40-14= | | y=-0.005x^2+0.6x | | 7x+2(x+2)=8x-2(x+1) | | 4-3e-2e=1-9 | | 2u^2+1u-1=0 | | 9n-400= | | 1-c=3 | | 2-7r= | | b-4.3=2.7 |