Math problem: The ratio of the two brothers' monthly income is 4:3, and the ratio of the amount of money paid is 18: 13. Both have a balance for the whole month. What is the monthly income of each per

Math problem: The ratio of the two brothers' monthly income is 4:3, and the ratio of the amount of money paid is 18: 13. Both have a balance for the whole month. What is the monthly income of each person required for 360 yuan? Solution: Assume that the income of each person is 4x yuan and 3x yuan respectively, and the expenditure is 18y yuan and 13y yuan respectively.

According to the meaning of the question:

4x- 18y=360

3x- 13y=360

X=900，y= 180。

Then 4x = 3600 and 3y = 2700.

A: The per capita income is 3,600 yuan and 2,700 yuan respectively.

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