Answer :
2 dvds = 3cds($13.20 a piece)
2dvds = 39.60
2x = 39.60 Divide by 2 on both sides
x = 19.80 (the price of one dvd)
2dvds = 39.60
2x = 39.60 Divide by 2 on both sides
x = 19.80 (the price of one dvd)