Question 861065
<pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
2x+4y+z=-3
<u>3x-4y-z=-22</u>  {{{  highlight_green(x = -5) }}} 
3x-4y-z=-22    |multiplying by2 added to second
<u>2x+y+2z=-3</u>
8x - 7y = -47 
-40 - 7y = -47 
   -7y = -7, {{{  highlight_green(y = 1) }}} 
2x+4y+z=-3
 -10 + 4 + z = -3
           z = 3
x=-5, y=1, and z=3