Answer
Refer to the image below for the graph.
Work Step by Step
Divide by $3$ on both sides to obtain:
$x=-4$
RECALL:
The graph of the equation $x=k$ is a vertical line.
Every point on the line has the same x-value.
Thus, to graph $x=-4$, you can plot the points (-4, 3), (-4, -3), and (-4, 0).
Then, connect them using a line.
