Solve for $w$ in terms of $x, y$, and $z$.
\[
\begin{array}{l}
z=-x w y \\
w=
\end{array}
\]
Simplify the expression: \(\boxed{w = \frac{-z}{xy}}\)
Step 1 :Divide both sides of the equation by \(-xy\): \(w = \frac{z}{-xy}\)
Step 2 :Simplify the expression: \(\boxed{w = \frac{-z}{xy}}\)