Answer:
x=-5
y=-4
Step-by-step explanation:
lest re write the equations as
4y-5x=9
-4y+x=11
adding both equations
4y-5x-4y+x=9+11
-4x=20
x=20/-4
putting x in second equation
-5-4y=11
-4y=11+5
-4y=16
y=16/-4
