B) -4
5b=6a+16
9a=7b-20
b=(6/5)a+(16/5)
9a=7((6/5)a+(16/5))-20
9a=(42/5)a+12/5
(3/5)a=12/5
a=4
5b=6(4)+16
5b=24+16
5b=40
b=8
3(4)-2(8)
12-16=-4
The number of seats in the stadium that were filled for the game is equal to 49,406 seats.
- Let the filled seats be F.
- Let the empty seats be E.
<u>Given the following data:</u>
- Stadium capacity = 70,580.
To determine the number of seats in the stadium that were filled for the game:
Mathematically, the number of filled seats in the stadium is given by this expression:

F = 49,406 seats.
Read more on ratio here: brainly.com/question/13513438