Cha658pter 9 - 9.3 - Multivariable Linear Systems - 9.3 Exercises - Page 658: 19

$x=-2; y=2$

Multiply the first equation by $2$, then add it to equation $2$. $2x+2y-2x+3y=0+10 \implies y=2$ Now, we will plug the value of $y$ into the first equation to find the value of $x$. We get: $x+2=0 \implies x=-2$ Thus, $x=-2; y=2$