Determine the augmented matrix associated with the following systems of linear equations.
\begin{cases} 2x-y=4 \cr \cr 4x+2y=3 \end{cases}
\begin{cases} 4x+2y=7 \cr \cr 2x+y=5 \end{cases}
\begin{cases} 3x-2y=2 \cr \cr x+3y=-3 \end{cases}
\begin{cases} 5x-2y=-1 \cr \cr 4x+6y=-1 \end{cases}
\begin{cases} -1x-y=-4 \cr \cr -4x+5y=-9 \end{cases}
\begin{cases} 2x=-4 \cr \cr -2y=9 \end{cases}
\begin{cases} 21x-12y=43 \cr \cr 14x+42y=23 \end{cases}