If it's not what You are looking for type in the equation solver your own equation and let us solve it.
k in (-oo:+oo)
1/8 = k^3 // - k^3
1/8-k^3 = 0
-1*k^3 = -1/8 // : -1
k^3 = 1/8
k^3 = 1/8 // ^ 1/3
k = 1/2
k = 1/2
| 0=x^2-55x+726 | | 2sin^2x=4sinx+6 | | 12k^2-12k+3=0 | | 17=3+2w | | 3x-2+16=6x+x-8 | | 3x+x+4=2x+10 | | -19=4v-7 | | -14=5r+8 | | x-9/5=-3 | | x(1+y)dx+y(1+x)dy=0 | | 8+8x=22+4 | | 64=4-4(3m-5) | | X^2-7x=22 | | 3u+6=21 | | 8x=255 | | 5n=8-3n | | (5-x)*x*(8-x)=0 | | 2x+-3y=48 | | 400=20r | | 23x-11y=-19 | | 5y+16=76 | | 16=u/4-11 | | y=4x*x-2x+3 | | 1/2r-3=3(4-3/2r)= | | 6/7=54/x | | 24-3v=5v | | y=-.50*1-4 | | 12-x=3x-24 | | 0x-6=-7/6x-7 | | 7(y-3)/4=-2y | | 100=x+0.1x | | 16-4x+12=12 |