Itema

The row equivalent reduced row echelon form is

\begin{equation*} \left[ \begin{array}{rrr|r} 1 \amp 0 \amp 2 \amp -4 \\ 0 \amp 1 \amp 3 \amp 2 \\ \end{array} \right], \end{equation*}

and there are infinitely many solutions.

in-context