SSC CGL 30 Aug 2015 Paper

Let incomes of A and B be Rs. 3x and Rs. 2x respectively. Let the expenditures of A and B be Rs. 5y and Rs. 3y respectively.
According to the question,
3x – 5y = Rs. 1000 .... (i)
2x – 3y = Rs. 1000 .... (ii)
By equation (i) × 2 – (ii) × 3,
6x - 10y = 2000
6x - 9y = 300
on solving
- y = - 1000
∴ y = 1000
From equation (i),
3x – 5 × 1000 = 1000
⇒ 3x = 1000 + 5000 = Rs. 6000
= A’s income