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

Luis : (Luis + Ken + Vaidev) = 2 : 5
Ken : (Luis + Vaidev) = 1 : 3

Vaidev has 20 erasers more than Ken. In the end, Vaidev gives away all he has to Ken and Luis so that both Ken and Luis end up with the same number of erasers, how many erasers has Luis received from Vaidev?
4 m

Click button first when a symbol is required. X

Luis, Ken and Vaidev have some erasers. The ratios of their erasers are as follows:

Luis : (Luis + Ken + Vaidev) = 2 : 5
Ken : (Luis + Vaidev) = 1 : 3

Vaidev has 20 erasers more than Ken. In the end, Vaidev gives away all he has to Ken and Luis so that both Ken and Luis end up with the same number of erasers, how many erasers has Luis received from Vaidev?