Question 814713
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
3x+4y+2z=3  |Multiplying thru by 4, Adding EQs
4x-2y-8z=-4
16x+14y = 8   0r 8x + 7y = 4

3x+4y+2z=3 
 x +y -z=3
5x+6y = 9

5x + 6y = 9 (-7)
8x + 7y = 4 (6)
13x = 39,  x = -3  and y = 4  {{{y = (-5/6)x + 9/6 = 15/6 + 9/6 = 4}}}
and z = (x+y-3) = -2