Given the system of equations below, write the system in $\displaystyle {A}{X}={B}$ form.

$\displaystyle -{3}{x}+{2}{y}={7}$ 

$\displaystyle {5}{x}-{4}{y}=-{21}$ 

$\displaystyle \cdot$ $\displaystyle {\left[\begin{array}{c} {x}\\{y}\end{array}\right]}$  $\displaystyle =$