Given:
Selling price of child ticket = $5.40
Selling price of adult ticket = $9.40
Total tickets = 168
Total sales = $1199.20
To find:
The number of adult tickets sold.
Solution:
Let x be the number of child tickets and y be the number of adult tickets.
Total tickets : ...(i)
Total sales : ...(ii)
From equation (i), we get
Put this value in (ii).
Divide both sides by 4.
Therefore, 73 adult tickets were sold that day.