The sum of two numbers, x and y, is 12. The difference of x and two times y is 6. What are the values of x and y?

Question

A.x = 8, y = 4

B.x = 10, y = 2

B.x = 18, y = -6

C.x = 20, y = -8

Answer 1

x + y = 12

x - 2y= 6   now subtract these:

     3y = 6

       y = 2, so x = 10