X+ y - 6 = 0
x - y - 8 = 0
when you eliminate y , what is the resulting equation?

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!

You get 2x-14=0

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

29933333.33

step-by-step explanation:

6×10=604000000÷60=66666.6666766666.6667×449=29933333.33