If x/y = 7/4, then (x + y)/(x - y) = ?
Answers:
A) 5
B) 11/3
C) -1/6
D) -1/5
E) -5
Any x and y satisfying x/y = 7/4 should give the same value for (x + y)/(x - y).   Say x=7 and y=4, then (x + y)/(x - y) = (7 + 4)/(7-4) = 11/3.   Answer: 11/3.
<result>B</result>
If x/y = 7/4, then (x + y)/(x - y) = ?