Answer
$\left[\begin{array}{lll}
1 & 3 & 4\\
1 & 2 & 3\\
1 & 4 & 3
\end{array}\right]\left[\begin{array}{l}
x\\
y\\
z
\end{array}\right] $=$\left[\begin{array}{l}
-3\\
-2\\
-6
\end{array}\right]$
Work Step by Step
Coefficient matrix A=$\left[\begin{array}{lll}
1 & 3 & 4\\
1 & 2 & 3\\
1 & 4 & 3
\end{array}\right]$
Constant matrix B=$\left[\begin{array}{l}
-3\\
-2\\
-6
\end{array}\right]$
Matrix equation:
$AX=B$
$\left[\begin{array}{lll}
1 & 3 & 4\\
1 & 2 & 3\\
1 & 4 & 3
\end{array}\right]\left[\begin{array}{l}
x\\
y\\
z
\end{array}\right] $=$\left[\begin{array}{l}
-3\\
-2\\
-6
\end{array}\right]$