If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x in (-oo:+oo)
(2/3)*x^27-7 = 0
2/3*x^27 = 7 // : 2/3
x^27 = 21/2
x^27 = 21/2 // ^ 1/27
x = (21/2)^(1/27)
x = (21/2)^(1/27)
| 2/3x27-7 | | -5=-2x-y | | 7-4(x-6)=8-4(x-3) | | 7x/2-3/2-4/1=5x/3+1/3 | | 10u^7-45u^6+45u^5=0 | | 7-4(0-6)=8-4(0-3) | | 4(c-5)-2(3c+5)=6 | | 9y=-12x-18 | | 7-4(-11-6)=8-4(-11-3) | | 9-6(4u-1)=1u+15 | | a-21=42 | | 0=-y-2 | | x^3-6x=7 | | 5/4x-5/3=-3 | | 1/2(x+4)=x^2+2 | | 4/7x-2/7=-12 | | -x+4y=25 | | 240/60= | | 10+2/3t=6 | | 4y+5=-23 | | 7-4(x-6)=8-4x(x-3) | | 2x+(-4x+6)=2 | | 6-2y=-7y | | -22/11 | | -3=2x+y | | 1/2(x+4)=x2+2 | | -y+2=-x | | 6x-x-1=1 | | (-7x+1)/9=-1 | | 5y-3y=2y | | 10-4(p+7)=2-2p | | 10-4(p+7)=2-20 |