The difference of two numbers is 11. One third of their sum is 7. What are the two numbers?
Choose the correct choice from the following choices
A) 21,10
B) 16,5
C) 3,14
D) 11,10
E) 7,14
Let the two numbers be x and y.   Equation (i): x - y = 11   Equation (ii): (x + y)/3 = 7   Solve system of equations:   x + y = 21   x - y = 11   (add equations together) --- 2x = 32 --- x=16   16 - y = 11 --- y=5   Since x=16 and y=5, answer 16,5 (16,5) is correct.
<result>B</result>
The difference of two numbers is 11. One third of their sum is 7. What are the two numbers?