The ratio of incomes of two persons is 9:7 and the ratio of their expenditures is 4:3. If each of them saves ₹2000 per month, find their monthly incomes.

आय = 9x, 7x। व्यय = 4y, 3y। (9x-2000)/4 = (7x-2000)/3। 27x - 6000 = 28x - 8000 => x = 2000। आय: 9*2000=18000 और 7*2000=14000।