Question
Three girls, Tiffany, Elyse and Cathy had a total of 2640 beads. Some exchanges were made. First, Tiffany gave Elyse as many beads as Elyse had. After that, Elyse gave 13 of whatever she had then to Cathy. Finally, Cathy gave 15 of whatever she had to Tiffany. As a result, they each had the same number of beads. How many beads did Tiffany have at first?
5 m

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Three girls, Tiffany, Elyse and Cathy had a total of 2640 beads. Some exchanges were made. First, Tiffany gave Elyse as many beads as Elyse had. After that, Elyse gave 13 of whatever she had then to Cathy. Finally, Cathy gave 15 of whatever she had to Tiffany. As a result, they each had the same number of beads. How many beads did Tiffany have at first?