Question
Three girls, Ivory, Joelle and Emma had a total of 1680 erasers. Some exchanges were made. First, Ivory gave Joelle as many erasers as Joelle had. After that, Joelle gave 15 of whatever she had then to Emma. Finally, Emma gave 13 of whatever she had to Ivory. As a result, they each had the same number of erasers. How many erasers did Ivory have at first?
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Three girls, Ivory, Joelle and Emma had a total of 1680 erasers. Some exchanges were made. First, Ivory gave Joelle as many erasers as Joelle had. After that, Joelle gave 15 of whatever she had then to Emma. Finally, Emma gave 13 of whatever she had to Ivory. As a result, they each had the same number of erasers. How many erasers did Ivory have at first?