Question
Three girls, Barbara, Xylia and Kylie had a total of 3900 coins. Some exchanges were made. First, Barbara gave Xylia as many coins as Xylia had. After that, Xylia gave 13 of whatever she had then to Kylie. Finally, Kylie gave 15 of whatever she had to Barbara. As a result, they each had the same number of coins. How many coins did Barbara have at first?
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Three girls, Barbara, Xylia and Kylie had a total of 3900 coins. Some exchanges were made. First, Barbara gave Xylia as many coins as Xylia had. After that, Xylia gave 13 of whatever she had then to Kylie. Finally, Kylie gave 15 of whatever she had to Barbara. As a result, they each had the same number of coins. How many coins did Barbara have at first?