Answer
Graph of $x+3=0$
Work Step by Step
Using the properties of equality, the given equation, $
x+3=0
,$ is equivalent to
\begin{align*}
x+3-3&=0-3
\\
x&=-3
.\end{align*}
The graph of $x=a$ is a vertical line passing through $(a,0).$ Hence, the graph of the equation above is a vertical line passing through $(-3,0)$.