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)
5*x^(-1/3) = 20 // - 20
5*x^(-1/3)-20 = 0
5*x^(-1/3) = 20 // : 5
x^(-1/3) = 4
-1/3 < 0
1/(x^(1/3)) = 4 // * x^(1/3)
1 = 4*x^(1/3) // : 4
1/4 = x^(1/3)
x^(1/3) = 1/4 // ^ 3
x = 1/64
x = 1/64
| 225=.04s | | -1/2p-3=3 | | 20x+y+12=180 | | 9-1=2h | | 36=r(18.5+r) | | x(500+3)=0 | | -1-7u=-15-8u | | X^3-2x^2-10x=0 | | 19j-16j+1=19 | | 9x+3=7x-1 | | 77x-1=67x-1 | | 9x-8x+5=17 | | 12+8x=x+47 | | -13x+23y=-7 | | 70=x+3+x+3+3x-8+3x-8 | | 4(b+1)=20 | | 7a-6a-1=15 | | 2(t-8)=4 | | (2y+x)dx+ydx=0 | | -5-5r=7-17r | | x+112=2x+68 | | 8-3(2x-3)=-4 | | x^2+4x+7=6 | | y-2=x/3 | | 14-4(3x-5)=-6 | | -2=g-16/-1 | | 5-x/67 | | 12y+25=-35You | | (6+y)+y=60 | | -10-19n=-18n | | 3y-6=y+6(-2) | | X+y+y=60 |