# A music store is selling CD's for $5.50 and $8.50. You buy 13 CDs and spend $92.50. How many $8.50 CDs did you buy?

##### 1 Answer

Sep 6, 2015

#### Explanation:

Define:

We are told

[1]

and

[2]

Multiplying [1] by

[3]

Subtracting [3] from [2]

[4]

Dividing [4] by

[5]

Substituting

[6]