Quiz: Solving Systems of Linear Equations

Determine the augmented matrix of the following system.

$-7{x}_{1}-8{x}_{2}+7{x}_{3}=-4$
$-4{x}_{1}+2{x}_{2}-{x}_{3}=-7$
$3{x}_{1}-2{x}_{2}-4{x}_{3}=7$

 $\left[\phantom{\rule{0ex}{10ex}}\phantom{\rule{3pt}{0ex}}$ $\phantom{\rule{0ex}{10ex}}|\phantom{\rule{3pt}{0ex}}$ $\phantom{\rule{0ex}{10ex}}\right]\phantom{\rule{3pt}{0ex}}$