Rajasthan Police Constable Model Paper 6

Let the incomes of X and Y be 5p and 3p respectively.
Let the expenditures of X and Y be 9q and 5q respectively.
Given, 5p - 9q = 1600 and 3p - 5q = 1600
⇒ 5p - 9q = 3p - 5q
⇒ 2p = 4q
∴ p = 2q
Substituting p’s value in any one of the equations
⇒ 5 × 2q - 9q = 1600
⇒ q = 1600
⇒ p = 3200
∴ Income of X = 5 × 3200 = Rs. 16000