1. The Lupos had x dollars in medical expenses. Medical insurance covered 80% of these expenses, so they had to pay 20% of the medical bills. For taxpayers in the Lupos' age bracket,
the IRS allows medical and dental expense deductions for the amount that exceeds 10% of a
taxpayer's adjusted gross income. Their adjusted gross income was y dollars. Express the
amount they can claim as a medical deduction algebraically.