Question
Xylia has a total of 150 pens. She has 35 more black pens than purple pens. She has thrice as many grey pens as black pens. How many black pens does she have?
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Xylia has a total of 150 pens. She has 35 more black pens than purple pens. She has thrice as many grey pens as black pens. How many black pens does she have?