He will pay $20 to rent a booth at the fall festival. Each keychain costs $1.50 to make. He sells each keychain for $4.00.

How many keychains must Adam sell so that he does not lose any money?

Mariano delivers newspaper. he always puts 3/4 of his weekly earnings in his savings account and then divides the rest equally into 3 piggy banks for spending at the snack shop, the arcade and the subway