Question
A bag had some green pens and black pens in the ratio of 3 : 1. Jade removed 31 green pens and put another 13 black pens into the bag. There is now 50% as many green pens as black pens in the bag. How many green pens were in the bag at first?
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A bag had some green pens and black pens in the ratio of 3 : 1. Jade removed 31 green pens and put another 13 black pens into the bag. There is now 50% as many green pens as black pens in the bag. How many green pens were in the bag at first?