x + y = 19 , and x + 3y = 1. Find the value of x + 2y  Choose the correct choice from the following answers:
A) 20
B) 18
C) 11
D) 10
E) 5

Rationale: add these two equations 2 x + 4 y = 20 divide by 2 ( to get x + 2 y ) answer will be d . 10
Answer: D