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It cost Mary 32 cents to mail a postcard and 42 cents to mail a letter She sent either a postcard or a letter to each of 18 people and spent $6 56 Find the number of postcards Mary mailed

It cost Mary 32 cents to mail a postcard and 42 cents to mail a letter. She sent either a postcard or a letter to each of 18 people and spent. $6.56. Find the number of postcards Mary mailed.

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Aug 01 2020 View more View Less

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