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OpenStudy (anonymous):
At a local bookstore, books that normally cost (b) dollars are on sale for 10 dollars off the normal price. How many dollars does it cost to buy 3 books on sale? A: 3b - 10 B: 3b + 10 C: 3 (b - 10) D: 3 (b + 10)
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OpenStudy (anonymous):
C: 3 (b - 10)
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