Answer
$\left[\begin{array}{llll}
2 & 1 & -3 & 5\\
2 & 3 & 1 & 13\\
0 & -8 & 8 & -8
\end{array}\right]$
Work Step by Step
$\left[\begin{array}{llll}
2 & 1 & -3 & 5\\
2 & 3 & 1 & 13\\
6-3(2) & -5-3(1) & -1-3(-3) & 7-3(5)
\end{array}\right]$
$\left[\begin{array}{llll}
2 & 1 & -3 & 5\\
2 & 3 & 1 & 13\\
0 & -8 & 8 & -8
\end{array}\right]$
