In a recent year, a letter to Europe from the United States costs $0.44. Nancy mailed 5 letters for $3.70, some to Europe and some to the United States. How many letters did she sent to Europe?

In a recent year, a letter to Europe from the United States costs $0.44. Nancy mailed 5 letters for $3.70, some to Europe and some to the United States. How many letters did she sent to Europe?

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