Question 706259
Hint: 


2x - y =6 
x + 2y =8



2(2x - y) =2*6 
x + 2y =8



4x - 2y = 12 
x + 2y = 8
------------
5x+0y = 20


5x = 20


Solve that for x. Then use that solution for x to get the solution for y.