If 3x – 5y = 5 and x/x+y=5/7, then what is the value of x – y?	Select the correct option:
A) 9  B) 6  C) 4  D) 3  E) none of these

Rationale: 3 x – 5 y = 5 . . . ( i ) and xx + y = 57 xx + y = 57 ⇒ 7 x = 5 x + 5 y ⇒ 2 x = 5 y . . . ( ii ) from ( i ) and ( ii ) , x = 5 and y = 2 ∴ x – y = 3 answer d
Answer: D