SOLUTION: Cookies are sold singly or in packages of 7 or 21. With this​ packaging, how many ways can you buy 42 ​cookies?
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Question 1126360: Cookies are sold singly or in packages of 7 or 21. With this packaging, how many ways can you buy 42 cookies?
Answer by FrankM(1040) (Show Source): You can put this solution on YOUR website!
21,21
21,7,7,7
7,7,7,7,7,7
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