Two groups of people need to get across town on minibuses. The first group has 57 people. Its minibuses carry 10 passengers each. The second group has 72
people. Its minibuses carry 12 passengers each.

A bus (contracted from omnibus,[1] with variants multibus, motorbus, autobus, etc.) is a road vehicledesigned to carry many passengers. Buses can have a capacity as high as 300 passengers.[2] The most common type is the single-deck rigid bus, with larger loads carried by double-decker and articulated buses, and smaller loads carried by midibuses and minibuses while coaches are used for longer-distance services. Many types of buses, such as city transit buses and inter-city coaches, charge a fare. Other types, such as elementary or secondary school buses or shuttle buses within a post-secondary education campus do not charge a fare. In many jurisdictions, bus drivers require a special licence above and beyond a regular driving licence.

x/3-10=8

x/3=18

x=48