Answer
$x=5$
Work Step by Step
If $b$ is a real number, $b\gt0$, and $b\ne1$, then $b^{\log_{b^{x}}}=x$ (according to Property 3 on page 569).
Therefore, $3^{log_{3^{5}}}=x=b^{\log_{b^{x}}}$, so $x=5$.
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.