Define variables and write systems of equations for the situation. solve using substitution. suppose you are thinking about buying one of two cars. car a will cost $17,655. you can expect to pay an average of $1230 per year for fuel, maintenance and repairs. car b will cost about $15,900. fuel maintenance and repairs for it will average about $1425 per year. after how many years are the total costs for the cars the same? a. 5 years c. 9 years b. 7 years d. 11 years
