Answer
$a^{\frac{1}{3}}$
Work Step by Step
$x . a^{\frac{2}{3}} = a^{\frac{3}{3}}$
To find $x$
$x = \frac{a^{\frac{3}{3}}}{a^{\frac{2}{3}}} $
Using $\frac{a^{m}}{a^{n}} = a^{m-n}$
$x = a^{\frac{3}{3}-\frac{2}{3}}$
$x = a^{\frac{3-2}{3}}$
$x = a^{\frac{1}{3}}$
