## Algebra and Trigonometry 10th Edition

$(-3,-1).$
$x+3y=-6\\2x+6y=-12$. $(2x+6y)-(2x+4y)=-12-(-10)\\2y=-2\\y=-1$ Thus $2x+6(-1)=-12\\2x=-6\\x=-3$. Thus the solution is $(-3,-1).$