Answer
$y=\frac{z}{7x}$
Work Step by Step
We are trying to isolate $y$ in the equation $7xy=z$
In order to do so, we divide by $7x$ on each side of the equation, since $7x$ is multiplied by $y$: $\frac{7xy}{7x}=\frac{z}{7x}$
We simplify: $y=\frac{z}{7x}$