Question 869345
1x-1y+1z=-4
2x-3y+4z=-15
5x+1y-2z=12
GAUSS JORDAN METHOD
Add (-2 * row1) to row2
1	 -1	 1	 -4
0	 -1	 2	 -7
5	 1	 -2	 12

Add (-5 * row1) to row3
1	 -1	 1	 -4
0	 -1	 2	 -7
0	 6	 -7	 32

Divide row2 by -1
1	 -1	 1	 -4
0	 1	 -2	 7
0	 6	 -7	 32

Add (-6 * row2) to row3
1	 -1	 1	 -4
0	 1	 -2	 7
0	 0	 5	 -10

Divide row3 by 5
1	 -1	 1	 -4
0	 1	 -2	 7
0	 0	 1	 -2

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

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

Add (1 * row2) to row1
1	 0	 0	 1
0	 1	 0	 3
0	 0	 1	 -2
CRAMER's rule
 *[invoke cramers_rule_3x3 1,-1,+1,-4,2,-3,+4,-15,5,+1,-2,12]