Question
A bag had some red pens and brown pens in the ratio of 3 : 1. Kimberly removed 31 red pens and put another 19 brown pens into the bag. There is now 25% as many red pens as brown pens in the bag. How many red pens were in the bag at first?
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A bag had some red pens and brown pens in the ratio of 3 : 1. Kimberly removed 31 red pens and put another 19 brown pens into the bag. There is now 25% as many red pens as brown pens in the bag. How many red pens were in the bag at first?