There are the solutions for x+y=3 and they are
(0,3) (2,1) and (1,2)
and for -x+2y=6 is
(0,3) (2,4) and (1 7/4)
hope this helps
The answer that I got was 15.
You start by setting the angles equal to each other, because they are verticle angles. You then distribute 11 to get 11y + 110 = 4y - 5.
You then just have to simplify, which I got -105 = -7y.
You can multiply each side by -1 to make them positive and divide 7 by 105 to get 15.