Acounty superintendent of the highways is interested in the numbers of different types of vehicles that regularly travel within his county. in the month of august a total of 192 registrations were purchased for passenger cars and pickup trucks at the local department of motor vehicles (dmv). the dmv reported that in the month of august, for every 5 passenger cars registered, there were 7 pickup trucks registered. how many of each type of vehicle were registered in the county in the month of august?