You must maintain a minimum balance of $50 in your checking account. You currently have a balance of $280
a. Write and solve an inequality that represents how many $20 bills you can withdraw from the account without going below the minimum balance.
b. Your bank charges an ATM fee of $2.50, which is charged each time you withdraw $20. Write and solve an inequality that represents how many $20 bills you can withdraw from the account without going below the minimum balance in this situation.