Answer
$$\frac{y}{9x^7z^7}$$
Work Step by Step
\begin{align}
(3x^{-4}yz^{-7})(3x)^{-3} & =(3x^{-4}yz^{-7})( 3^{-3}x^{-3}) \\ &= 3^{-2}x^{-7}yz^{-7} \\ &= \frac{y}{9x^7z^7}
\end{align}
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.