Tips & Tricks Given: The ratio of monthly income of Ram and Rahim is 4 : 3 and the ratio of their monthly expenditures is 3 : 2. Calculation: Let the monthly income of Ram and Rahim be 4x and 3x And their expenditures be 3y : 2y Income - expenditure = saving ⇒ 4x - 3y = 5000 ---- (1) ⇒ 3x - 2y = 5000 ---- (2) Now multiply equation (1) by and (2) by 3 ⇒ - x = - 5000 ⇒ x = 5000 ⇒ Monthly income of Ram = 4x = Rs. 20000 ⇒ Monthly income of Rahim = 3x = Rs. 15000 ∴ Monthly income of Ram and Rahim are Rs. 20000 and Rs. 15000.