In the System $\left\{ \begin{array} { l } x - y + z = 4 \\x + 2 y - z = - 1 \\x + y - 5 z = - 4\end{array} \right.$

Multiple Choice

In the system $\left\{ \begin{array} { l } x - y + z = 4 \\x + 2 y - z = - 1 \\x + y - 5 z = - 4\end{array} \right.$ , equations 1 and 2 were added to eliminate z . Then equation 2 was multiplied by 5 and added to equation 3 to eliminate z . Which of the following systems of equations would be the result?

A) $\left\{ \begin{array} { l } 2 x + y = 3 \\- 4 x - 9 y = - 8\end{array} \right.$
B) $\left\{ \begin{array} { l } 2 x + y = 3 \\- 4 x - 9 y = 1\end{array} \right.$
C) $\left\{ \begin{array} { l } 2 x - y = 3 \\- 4 x - 9 y = - 3\end{array} \right.$
D) $\left\{ \begin{array} { l } 2 x + y = 3 \\9 x + 9 y = - 8\end{array} \right.$