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Solving math problems: 36 people go to play, 6 people can take the bus and 4 people can take the bus. How many cars do you want to rent for both? What kind of cars are they?
Car rental: 36÷6=6.

Full car rental: 36÷4=9 cars.

Rent two cars: 36=6×(2)+4×(6) requires 2+6=8 cars.

36=6×(4)+4×(3) requires 4+3=7 vehicles.

Because 7 < 8, you need at least 7 cars, 4 buses and 3 cars.