If 2x + y = 26 and x + 2y = 10, then (x + y)/3 =
Select the correct option
A) 1  B) 4 / 3  C) 17 / 5  D) 18 / 5  E) 4

Rationale: "we have two equations : 2 x + y = 26 x + 2 y = 10 notice that something nice happens when we add them . we get : 3 x + 3 y = 36 divide both sides by 3 to get : x + y = 12 so , ( x + y ) / 3 = 12 / 3 = 4 answer : e"
Answer: E