Answer
\begin{align*}
2x+z&=9 \\-y-z&=5 \\ 3x+y&=8
\end{align*}
Work Step by Step
Each line represents an equation.
The first three columns from the left represent the coefficients of $x, y, \text{ and } z$, respectively.
The fourth column represents the constant on the right-hand side of the equation
Therefore, the system of equations can be expressed as:
\begin{align*}
2x+(0)y+(1)z&= 9 \\ (0)x+(-1)y+(-1)z&=5 \\(3)x+(1)y+(0)z&=8
\end{align*}
which when simplified becomes
\begin{align*}
2x+z&=9 \\-y-z&=5 \\ 3x+y&=8
\end{align*}