Answer:
x=3; y=-2
Explanation:
this is nice! your 3y in the first equation and the -3y in the second equation will cancel out if you add the two equations together
you'll get
3x = 9
x = 3
and then, you can substitute it into any of the equations
for this problem, i'll substitute it into the second equation
-3-3y=3
-3y=6
y=-2