Question
Three girls, Yen, Xylia and Shiyun had a total of 3960 erasers. Some exchanges were made. First, Yen gave Xylia as many erasers as Xylia had. After that, Xylia gave 14 of whatever she had then to Shiyun. Finally, Shiyun gave 13 of whatever she had to Yen. As a result, they each had the same number of erasers. How many erasers did Yen have at first?
5 m

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Three girls, Yen, Xylia and Shiyun had a total of 3960 erasers. Some exchanges were made. First, Yen gave Xylia as many erasers as Xylia had. After that, Xylia gave 14 of whatever she had then to Shiyun. Finally, Shiyun gave 13 of whatever she had to Yen. As a result, they each had the same number of erasers. How many erasers did Yen have at first?