<PRE><B>Question 216846</B>
 An online music store is having a sale. Any song costs 75 cents and any ringtone costs 50 cents. 
Emma can buy 6 songs and 2 audiobooks for the same price as 5 ringtones and 3 audiobooks. What is the cost of an audiobook? 
------------------------------------------------------------
6*75 + 2*(ab) = 5*50 + 3(ab)
---
450 - 250 = ab
---
ab = $2.00
=====================
Cheers,
Stan H.</PRE>