Answer
$x=\dfrac{v}{y\cdot z}$
Work Step by Step
DIvide both sides of the equation by $y \cdot z$ then cancel the common factors to obtain:
$$
\require{cancel}
\begin{align*}
\frac{v}{y\cdot z}&=\frac{x\cdot y \cdot z}{y\cdot z}\\
\\\frac{v}{y\cdot z}&=\frac{x\cdot \cancel{y} \cdot \cancel{z}}{\cancel{y}\cdot \cancel{z}}\\
\\\frac{v}{y\cdot z}&=x
\end{align*}$$
