If x/y = 2/5, then (x + y)/(x - y) = ? Select.
A) 5 B) 1 / 5 C) - 1 / 6 D) - 1 / 5 E) - 7 / 3

Rationale: any x and y satisfying x / y = 2 / 5 should give the same value for ( x + y ) / ( x - y ) . say x = 2 and y = 5 , then ( x + y ) / ( x - y ) = ( 2 + 5 ) / ( 2 - 5 ) = - 7 / 3 . answer : e .
Answer: E