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Al has twice as many baseball cards as Frank and 4 times as many football cards as Joe. The expression to 2x + 4Y can be used to show the total number of baseball and football cards Al has. If the answer is y, then what is the question ?

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sherettaholmes1
Frank has X baseball cards. 
Ai has 2x baseball cards. 

Joe has Y football cards. 
Ai has 4y football cards. 
Ai has 2x + 4y baseballs and foot balls. 

QUESTION: How many football cards does Joe have?

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