Answer :
they have 60 delivery vans because 84 divided by 7 is 12 so you multiply 5 and 12 to get 60
60 vans because [tex] \frac{7}{84} = \frac{5}{x} [/tex] and if you cross multiply you get 7x=420, then you divide 7 from each side to get x=60 and x is the number of vans the larger company has.