Answer:
y=4
Explanation:
If you multiply the first one by 2, you get:
8x - 2y = 56
If you add that one to the second one, the -2y term disappears:
8x+3x-2y+2y = 56+32
11x = 88
x=8 (divide by 11)
Fill in x=8 in the first:
4*8 - y = 28
32 - y = 28
y = 32-28 = 4