Answer:
2x+y=-2
-9x-3y=18
So what you would do is see which one you would like to get rid of (either x, or y in this situation get rid of y)
multiply y by postive 3
3(2x+y=-2)
6x+3y=-6
-9x-3y=18 (both y's cross out since 3y+-3y is equal to zero)
-----------------
-3x=-24 (divide both sides by -3)
--- ---
-3 -3
x= 8 (neg/neg=positive)
Then figure out the x so use either the first or second equation
so in this case I will use the first equation (plug in the x for 8)
2(8)+y=-2
16+y=-2
-16 -16
---------------
y=-18
Check:
2x+y=-2
2(8)+y(-18)=-2
16+-18=-2
-2=-2 (therfore you know that you are right)
Ansers:
y=-18
x=8
Hope this helps!