Question
Eric, Zeph and Brandon have some cards. The ratios of their cards are as follows:

Eric : (Eric + Zeph + Brandon) = 3 : 7
Zeph : (Eric + Brandon) = 1 : 5

Brandon has 60 cards more than Zeph. In the end, Brandon gives away all he has to Zeph and Eric so that both Zeph and Eric end up with the same number of cards, how many cards has Eric received from Brandon?
4 m

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Eric, Zeph and Brandon have some cards. The ratios of their cards are as follows:

Eric : (Eric + Zeph + Brandon) = 3 : 7
Zeph : (Eric + Brandon) = 1 : 5

Brandon has 60 cards more than Zeph. In the end, Brandon gives away all he has to Zeph and Eric so that both Zeph and Eric end up with the same number of cards, how many cards has Eric received from Brandon?