Question
Yen has a total of 74 pens. She has 11 more black pens than blue pens. She has thrice as many purple pens as black pens. How many black pens does she have?
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Yen has a total of 74 pens. She has 11 more black pens than blue pens. She has thrice as many purple pens as black pens. How many black pens does she have?