Chapter 4.5, Problem 209E

In the following exercises, perform the indicated operations on the augmented matrices.

209. Perform the needed row operations that will get the first entry in both row 2 and row 3 to be zero in the augmented matrix: $\left[\begin{array}{ccc}1& -2& 3\\ 3& -1& -2\\ 2& -3& -4\end{array}|\begin{array}{c}-4\\ 5\\ -1\end{array}\right]$ .