Answer:
A or y = 5
Step-by-step explanation:
So from the last explanation, we know that each row or column must be 9. The middle row and middle column must also be 9 so:
6 + y - 2 = 9, and 0 + y + 4 = 9
4 + y = 9, and 4 + y = 9
So we can conclude that:
Y must be 5
