Question 862218
x+2y+2z=13 
-2x+y+z=-1 
-x+2y-z=-8
Add (2 * row1) to row2
1	 2	 2	 13
0	 5	 5	 25
-1	 2	 -1	 8

Add (1 * row1) to row3
1	 2	 2	 13
0	 5	 5	 25
0	 4	 1	 21

Divide row2 by 5
1	 2	 2	 13
0	 1	 1	 5
0	 4	 1	 21

Add (-4 * row2) to row3
1	 2	 2	 13
0	 1	 1	 5
0	 0	 -3	 1

Divide row3 by -3
1	 2	 2	 13
0	 1	 1	 5
0	 0	 1	 -1/3

Add (-1 * row3) to row2
1	 2	 2	 13
0	 1	 0	 16/3
0	 0	 1	 -1/3

Add (-2 * row3) to row1
1	 2	 0	 41/3
0	 1	 0	 16/3
0	 0	 1	 -1/3

Add (-2 * row2) to row1
1	 0	 0	 3
0	 1	 0	 16/3
0	 0	 1	 -1/3