Algebra 1

Published by Prentice Hall
ISBN 10: 0133500403
ISBN 13: 978-0-13350-040-0

Chapter 2 - Solving Equations - 2-1 Solving One-Step Equations - Practice and Problem-Solving Exercises - Page 85: 50


23 CDs

Work Step by Step

In order to solve this, we need to name c as the variable which represents the number of current CDs. Since we know that the total amount that the rack can hold is 30 CDs, and we can add 7 more CDs before it is full, our equation would look like: c+7=30 Then, we need to get c by itself, so we subtract 7 from each side. (c+7) -7 =30 -7 c=23 CDs
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