Question
Daniel, Zeph and Mark have some buttons. The ratios of their buttons are as follows:

Daniel : (Daniel + Zeph + Mark) = 2 : 5
Zeph : (Daniel + Mark) = 1 : 5

Mark has 80 buttons more than Zeph. In the end, Mark gives away all he has to Zeph and Daniel so that both Zeph and Daniel end up with the same number of buttons, how many buttons has Daniel received from Mark?
4 m

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Daniel, Zeph and Mark have some buttons. The ratios of their buttons are as follows:

Daniel : (Daniel + Zeph + Mark) = 2 : 5
Zeph : (Daniel + Mark) = 1 : 5

Mark has 80 buttons more than Zeph. In the end, Mark gives away all he has to Zeph and Daniel so that both Zeph and Daniel end up with the same number of buttons, how many buttons has Daniel received from Mark?