Answer:
Number of box seats = 1000
Number of lower deck seats = 5000
Number of upper deck seats = 4000
Step-by-step explanation:
Let number of box seats = 
Let number of lower deck seats = 
Let number of upper deck seats = 
As per question statement:
...... (1)
Cost for box seat = $10
Cost for
box seats = 10
Cost for lower deck seat = $8
Cost for
lower deck seats = 8
Cost for lower deck seat = $5
Cost for
lower deck seats = 5
As per question statement:
..... (2)
..... (3)
Putting value of
in (1) and (2):
....... (4)

8
(4) - (5):
10000

By (3):

Now, by equation (1):
= 5000
Number of box seats = 1000
Number of lower deck seats = 5000
Number of upper deck seats = 4000