Answer
$n\leq -7 $ or $ n\gt 12$
The graph is shown below.
Work Step by Step
$n$ is less than or equal to $-7$.
$\Rightarrow n\leq -7$
or
$n$ is greater than $12$.
$\Rightarrow n\gt 12$
The compound inequality is
$n\leq -7 $ or $ n\gt 12$.
Graph the union of the graphs of $n\leq -7$ and $n\gt 12$.