Question
Oliver, Luis and Fred have some erasers. The ratios of their erasers are as follows:

Oliver : (Oliver + Luis + Fred) = 1 : 5
Luis : (Oliver + Fred) = 1 : 5

Fred has 84 erasers more than Luis. In the end, Fred gives away all he has to Luis and Oliver so that both Luis and Oliver end up with the same number of erasers, how many erasers has Oliver received from Fred?
4 m

Click button first when a symbol is required. X

Oliver, Luis and Fred have some erasers. The ratios of their erasers are as follows:

Oliver : (Oliver + Luis + Fred) = 1 : 5
Luis : (Oliver + Fred) = 1 : 5

Fred has 84 erasers more than Luis. In the end, Fred gives away all he has to Luis and Oliver so that both Luis and Oliver end up with the same number of erasers, how many erasers has Oliver received from Fred?