Answer:
(-1, 2)
Explanation:
9x+2y=-5
-9x+y=11
If you notice that these two equations can be easily worked out with since 9x (from the first equation) and -9x (from the second equation) can be easily eliminated. So, you will start adding the left numbers/variables from the two equations.
9x+2y=-5
-9x+y=11
2y+y=3y (every variable has a secret/hidden 1)
-5+11=6
3y=6
(divide 6 by 3)
y=2
Replace the value of y into ANY of the equations from the question. (I would be using the second one)
-9x + y = 11
-9x+2=11
(now just do simple algebra)
-9x=9
x=-1