Admission to a theater cost $5.50 for a child ticket and $11.50 for an adult ticket. The theater sold 80 tickets for $734.00. How many of each type of ticket was sold?

Problem 3 a bank charges a service fee of $7.50 per month for a checking account. a bank account has $85.00. if no money is deposited or withdrawn except the service charge, how many months until the account balance is negative