Question
Rachel, Cathy and Xylia have 432 buttons. Rachel has 45 as many buttons as Cathy. Xylia's buttons is 15 of the total number of Rachel's and Cathy's buttons. How many buttons must Cathy give to Xylia so that both Rachel and Xylia will have the same number of buttons?
4 m

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Rachel, Cathy and Xylia have 432 buttons. Rachel has 45 as many buttons as Cathy. Xylia's buttons is 15 of the total number of Rachel's and Cathy's buttons. How many buttons must Cathy give to Xylia so that both Rachel and Xylia will have the same number of buttons?