Answer
$$n = 5M$$
Work Step by Step
To solve this equation for $n$, we need to isolate $n$ to one side of the equation. Because $n$ is divided by $5$, we do the opposite of division on both sides of the equation to get rid of the fraction but still keeping the equation equal on both sides.
Thus, we will multiply both sides of the equation by $5$ to get rid of the fraction and also isolate the variable $n$. We then get:
$$n = 5M$$