Math problem: There are 55 motorcycles and cars in the parking lot, with wheels 160. How many motorcycles and cars are there in the parking lot?
Suppose all the cars are parked and there are 4×55=220 wheels; Then there are 220- 160=60 wheels more than in the title; So there are 60÷(4-2)=30 motorcycles; So there are 55-30=25 cars. Actually, it's easier to use equations. Suppose there are X motorcycles and Y cars, and the equation is as follows: X+Y = 55 ① 2x+4Y =160x+2Y = 80 ② If ① is subtracted from ②, Y=25 can be obtained, so X=30, so there are 25 cars and 30 motorcycles.