Answer
The solution is $x=-2$.
Work Step by Step
The given equation is
$\Rightarrow x+4=-x$
Write a system of linear equations using each side of the original equation.
$\Rightarrow y=x+4$ ...... (1)
$\Rightarrow y=-x$ ...... (2)
By using graphing calculator graph the system.
The intersection point is $(-2,2)$.
Check:
$\Rightarrow x+4=-x$
$\Rightarrow -2+4=-(-2)$
$\Rightarrow 2=2$
True.
Hence, the solution is $x=-2$.
