The monthly incomes of A and B are in the ratio 5 : 4 and their monthly expenditures are in the ratio 7:5. If each saves ₹ 9000 per month, find the monthly income of each.

Explanation

To solve the problem step by step, we will define the variables based on the information given and then set up equations to find the monthly incomes of A and B.

### Step 1: Define the variables for incomes and expenditures
Let the monthly income of A be \(5x\) and the monthly income of B be \(4x\), where \(x\) is a common multiplier.

Let the monthly expenditure of A be \(7y\) and the monthly expenditure of B be \(5y\), where \(y\) is another common multiplier.