Question 633515
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
 3x + 5y – z = 2 
-x – 8y + 3z = -6  |multipling 1st EQ by 8, 2nd by 5 and adding EQs to eliminate y
 24x - 8z = 16
<u>-5x  +15z = -30</u>
  19x + 7z = -14
    z = 2/3x
  19x + 14/3x = -14  ||Multiplying thru by 3 so as all denominators = 1
71x = -42
         x = -42/71 , z = -28/71  
substitute x and z into 1st EQ to find y = {{{(2 + 98/71)/5 = (240/71)/5 = 48/71}}}