Question 325289
from the second statement u can isolate x to get x=11+2y. we will use the right side of this equation to sub into the first equation's x variable.

-7(11+2y)-2y=-13
-77-14y-2y = -13
-16y=64
y=-4

use this value into either equation 1 or 2 to get x. using equation 2 will be easier so since we already know x=11+2y, x=11+2(-4), x=11-8, x=3

check:
-7(3)-2(-4)=-21+8 = -13, as expected
and 3-2(-4)=3+8=11, as expected

therefore x=3, y=-4