|x+3|-(-5)=13-(+4)
|x + 3| + 5 = 9
|x + 3| = 9 - 5
|x + 3| = 4
\(\left[ \begin{array}{l}x+3=4\\x+3=-4\end{array} \right.\)
\(\left[ \begin{array}{l}x=4-3\\x=-4-3\end{array} \right.\)
\(\left[ \begin{array}{l}x=1\\x=-7\end{array} \right.\)
Vậy x = 1 hoặc x = -7
