Question
Risa has 15 as many coins as Xuan. They have a total of 84 coins. How many coins must Xuan give to Risa so that they will have the same number of coins?
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Risa has 15 as many coins as Xuan. They have a total of 84 coins. How many coins must Xuan give to Risa so that they will have the same number of coins?