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posted by Vic Wednesday, September 28, 2011 at 12:21am.
A record stores sells CDs for $12 each.A music club offers 5 free CDs and charges $15 for each additional CD.How many CDs would have to buy for cost to be the same?
Let x = # of CDs. 12x = 15x - 60 60 = 3x 20 = x
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