Lisa has five times as many books as she has CDs. She must be either over 45 or a librarian. Lisa also has 35 books. Okay, scratch that. She just hates music. How many CDs does she have?
(# books Lisa has) = 5(#CDs Lisa has)
Let C be the number of CDs Lisa has. Then
5C = 35
Solving this equation gives us C = 7, so Lisa has 7 CDs. Sadly, all seven of them are ABBA CDs. You need to expand your horizons and get with the times, Lisa.
Although ABBA is pretty cool, we're not going to lie. Disco forever!