The sales price of a new compact disc player is $210 at a local discount store. At the store where t

The sales price of a new compact disc player is $210 at a local discount store. At the store where the sale is going on, each new cd is on sale for $11. If Kyle purchases a player and some cds for $243 how many cds did he purchase?

If Kyle bought the player, he has 243 - 210 = 33 left over.

Each cd is 11, so set up an equation to see how many CDs he bought:
11x = 33

Divide each side by 11
x = 3