Answer
$z^{6x-7}$
Work Step by Step
We are given the expression $\frac{z^{6x}}{z^{7}}$.
To simplify, we can use the quotient rule, which holds that $\frac{a^{m}}{a^{n}}=a^{m-n}$ (where a is a nonzero real number, and m and n are integers).
$\frac{z^{6x}}{z^{7}}=z^{6x-7}$