Let Rs x be the income of A, Rs y be the income of B. Rs 600 is the saving per month from both A and B. Therefore expenditure of A =(x−600) Expenditure of B =(y−600) From given conditions, x∕y=4∕3 3x=4y 3x−4y=0.....(1) The ratio of expenditures will be (x−600)∕(y−600)=3∕2 Cross multiplying and simplifying we get 2x−3y=−600......(2) Solving equations 1 and 2 We get x=2400 and y=1800 Hence monthly income of A = ₹ 2400 Monthly income of B =₹1800