Question 95230

  
  3x+2y-4z=3
   2X+3y+3z=`15
    5x-3y+z=14
     |3 2 -4 |3  |p
     |2 3  3 |15 |r
     |5 -3 1 |14 | q         
  we need 1 in the 1st col. of p .we start with row q,with z
    
    1 -3 5 | 14.1 -3 5 |14  |  1  -3  5  | 14
    -4 2 3 |3  =0 10 -23|-39|= 0 10  -23 |-39
    3 3 2  |15  0 -6 13 |27   |  0 0  4\5|93\5
  x=93\5,