Help me with this question

6 CDs for $75 is the better deal

Step-by-step explanation:

We get this by dividing by the cost of one CDs. So we would do 60/4 for the first sale and 75/6 for the second sale.

To make it easier to divide we can divide both 60 and 4 by two to get 30/2. In this case we get $15 per CD in the first sale.

Then in the second sale we would divide the total price 75 by the number of CDs 6. Our equation would then be 75/6 = x. We can divide each side by 3 to make the problem easier to solve. So the new equation would be 25/2. Then our answer would be 12.5 but since we are working with money we would have to put a 0 at the end of 12.5