Question
Zara, Lynn and Xuan have 648 cards. Zara has 45 as many cards as Lynn. Xuan's cards is 15 of the total number of Zara's and Lynn's cards. How many cards must Lynn give to Xuan so that both Zara and Xuan will have the same number of cards?
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Zara, Lynn and Xuan have 648 cards. Zara has 45 as many cards as Lynn. Xuan's cards is 15 of the total number of Zara's and Lynn's cards. How many cards must Lynn give to Xuan so that both Zara and Xuan will have the same number of cards?