The fifth grade math problem school bought four basketballs and nine footballs, which cost 623.7 yuan. The price of each basketball is 65438+ 0.8 times that of each football. How much is each basketball?
Solution: Let each football be X yuan and each basketball be 1.8X yuan.
4 times 1.8x+9x = 623.7.
4 times 9.9X=623.7
9.9X=623.7 divided by 4
9.9X= 155.925
X = 155.925 divided by 9.9.
X= 15.75
1.8x = 1.8 times 15.75 = 28.35.
A: It's 28.35 yuan per basketball.