Answer
$(3,0)$
Work Step by Step
Terms containing $y$ are opposite in the additive sense.
Add the equations:
$ 3x=9\qquad$ ... and solve for $x$
$x=3$
Substitute into one of the initial equations:
$x-y=3$
$3-y=3$
$y=0$
Form an ordered pair $(x,y)$ as the solution to the system
$(3,0)$