Posted by **Mary** on Friday, January 27, 2012 at 4:33pm.

How do I set this up and solve it?

Tom has a collection of 30 CDs and Nita has a collection of 15 CDs. Tom is adding 1 CD a month to his collection while Nita is adding 4 CDs a month to her collection. Find the number of months after which they will have the same number of CDs.

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