Question
Fred has a total of 40 of gold and black pens. 16 of the gold pens and half of the black pens are new. How many of his black pens are new if he has a total of 12 new pens?
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Fred has a total of 40 of gold and black pens. 16 of the gold pens and half of the black pens are new. How many of his black pens are new if he has a total of 12 new pens?