Answer
$x=3$
Work Step by Step
RECALL:
$\log_b{x}= y \longrightarrow b^y=x$
Use the rule above to obtain:
$9^{\frac{1}{2}}=x$
Use the rule $a^{\frac{1}{2}} = \sqrt{a}$ to obtain:
$\sqrt{9} = x
\\\sqrt{3^2} = x
\\3=x$