Respuesta :

When we eliminate y,(by adding here), resulting equation would be:

2x - 14 =0

So, x = 7

You can find the value of y as well, by substituting the value of x, 
7 - y -8 = 0
y = -1

Hope this helps!
Hailey011001
you get 2x-14=0

x+y-6=0
x-y-8=0
--------------   Then add the rest up
2x-14=0