Question
A bag had some black crayons and brown crayons in the ratio of 3 : 1. Opal removed 28 black crayons and put another 19 brown crayons into the bag. There is now 50% as many black crayons as brown crayons in the bag. How many black crayons were in the bag at first?
4 m

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A bag had some black crayons and brown crayons in the ratio of 3 : 1. Opal removed 28 black crayons and put another 19 brown crayons into the bag. There is now 50% as many black crayons as brown crayons in the bag. How many black crayons were in the bag at first?