Question
Three girls, Yoko, Marion and Emma had a total of 2520 pens. Some exchanges were made. First, Yoko gave Marion as many pens as Marion had. After that, Marion gave 14 of whatever she had then to Emma. Finally, Emma gave 15 of whatever she had to Yoko. As a result, they each had the same number of pens. How many pens did Yoko have at first?
5 m

Click button first when a symbol is required. X

Three girls, Yoko, Marion and Emma had a total of 2520 pens. Some exchanges were made. First, Yoko gave Marion as many pens as Marion had. After that, Marion gave 14 of whatever she had then to Emma. Finally, Emma gave 15 of whatever she had to Yoko. As a result, they each had the same number of pens. How many pens did Yoko have at first?