# You have a rack that can hold 30 CDs. You can fit 7 more CDs on the rack before the rack is full. How many CDs are in the rack?

Sep 2, 2017

23

#### Explanation:

This equation represents the situation:

$x + 7 = 30$

where x is the number of CDs on the rack

Now we just solve for x to figure out how many CDs there are.

$x + 7 = 30$

$x = 23$