Flim, Flam, Flum (20characters)?

[WikkedlLillGrrrls]

If 26 Flims weigh as much as 4 Flams and 2 Flums while 8 Flims and 2 Flams have the same weight as 2 Flums, how many Flims have the same weight as 3 Flums?

 

[KS]

fee fi foo fum... I don't get this one.