Cha658pter 9 - 9.3 - Multivariable Linear Systems - 9.3 Exercises - Page 658: 22

$x=-3; y=2$

Multiply the first equation by $2$, then add it to equation $2$. $7x=-21 \\ \implies x=-3$ Now, we will plug the value of $x$ into the first equation to find the value of $y$. We get: $2(-3)+4y=2 \\ \implies y=2$ Thus, $x=-3; y=2$