giúp tớ với (x-2/3)^3 = -1/27

Bạn tham khảo!
$($ $x$ $-$ $\dfrac{2}{3}$ $)^{3}$ $=$ $\dfrac{-1}{27}$
$→$ $($ $x$ $-$ $\dfrac{2}{3}$ $)^{3}$ $=$ $($ $\dfrac{-1}{3}$ $)^{3}$
$→$ $x$ $-$ $\dfrac{2}{3}$ $=$ $\dfrac{-1}{3}$
$→$ $x$ $=$ $\dfrac{-1}{3}$ $+$ $\dfrac{2}{3}$
$→$ $x$ $=$ $\dfrac{1}{3}$
Vậy $x$ $=$ $\dfrac{1}{3}$
$FbBinhne2k88$