Question

the ratio of income of a2 person is 9:7 and the ratio of their expenditure is 4:3 0if each of them manages to save 2000 per month find their mothly incomes

Answer 1

Let the income be 9x and 7x and expenditure be 4y and 3y.

Now the equation becomes :

9x - 4y = 2000 and
7x - 3y = 2000


Now solve it