HELP PLEAS Two groups of robbers left the bank at the same time. One group
of robbers drove 1 vans and 6 cars that traveled at a total of 372
kph. The second group drove 4 vans and 12 cars and traveled at a
total of 780 kph. Every van and every car drove the same speed.
What speed did the vanš drive at? What speed did the cars drive at?