Answer
$\{(-2,6)\}$
Work Step by Step
Graph each line
(plot two points per line, such as the interceptcs)
$x+y=4:\quad \left[\begin{array}{lll}
x=0 & ... & y=0\\
y=4 & & x=4\\
(0,4) & & (4,0)
\end{array}\right]$
$ x=-2\quad$.... vertical line through $(-2,0)$
There is an intersection point,
the solution set is $\{(-2,6)\}$
