Answer
$|x-7|\le5$
Work Step by Step
Halfway between the boundaries of the given graph, $2$ and $12,$ is $7.$ From $7,$ the points on the graph represent all numbers that are less than or equal to $5$ units away. Hence, the given graph is equivalent to
\begin{array}{l}\require{cancel}
|x-7|\le5
.\end{array}