If x/y = 2/7, then (x + y)/(x - y) = ? Choose the correct choice from the following answers:
A) 5  B) 1/5  C) -1/6  D) -9/5  E) -5
Any x and y satisfying x/y = 2/7 should give the same value for (x + y)/(x - y).   Say x=2 and y=7, then (x + y)/(x - y) = (2 + 7)/(2-7) = -9/5.   Answer: -9/5.
<result>D</result>
If x/y = 2/7, then (x + y)/(x - y) = ?