Answer:
x=-1, y=-10
Explanation:
First you would subtract the like terms from each other:
9x-5x=4x
-2y-2y=-4y
11-15=-4
Then you would put it back in its equation form as 4x-4y=-4
You would solve for x:
4x=-4+4y
Then ignore 4y and divide 4 from both sides to isolate x:
x=-1
Solve then for y by substituting x into one of the equations:
9(-1)-2y=11
Multiply 9 times x:
-9-2y=11
Add 9 to both sides, cancelling it on the left and adding 9 to 11:
-2y=20
Divide -2 from 20
y=-10