Question 1069422

Need help solving system with three variables

-2x + 8y + 2z = 4
  x + 6y + 3z = 4
 3x - 2y +  z = 0
<pre>{{{matrix(3,4, - 2x + 8y + 2z = 4, "-------", eq, "(i)", x + 6y + 3z = 4, "-------", eq, "(ii)", 3x - 2y +  z = 0, "-------", eq, "(iii)")}}}
x + 6y + 3z = 4 ------- Adding eqs (i) & (iii) ------- eq (iv)
If you inspect eqs (iv) & (ii), you'll see that they are IDENTICAL. What do you think this means? If you don't know, then you need to look it up. 
I think I've done the harder part of the work for you.