Question 861347


Divide row1 by 10
1     -7/10     3/10     1/2     3/5
-6     8     -1     4     5
3     1     4     11     2
5     -9     -2     4     7

Add (6 * row1) to row2
1     -7/10     3/10     1/2     3/5
0     19/5     4/5     7     43/5
3     1     4     11     2
5     -9     -2     4     7

Add (-3 * row1) to row3
1     -7/10     3/10     1/2     3/5
0     19/5     4/5     7     43/5
0     31/10     31/10     19/2     1/5
5     -9     -2     4     7

Add (-5 * row1) to row4
1     -7/10     3/10     1/2     3/5
0     19/5     4/5     7     43/5
0     31/10     31/10     19/2     1/5
0     -11/2     -7/2     3/2     4

Divide row2 by 19/5
1     -7/10     3/10     1/2     3/5
0     1     4/19     35/19     43/19
0     31/10     31/10     19/2     1/5
0     -11/2     -7/2     3/2     4

Add (-31/10 * row2) to row3
1     -7/10     3/10     1/2     3/5
0     1     4/19     35/19     43/19
0     0     93/38     72/19     -259/38
0     -11/2     -7/2     3/2     4

Add (11/2 * row2) to row4
1     -7/10     3/10     1/2     3/5
0     1     4/19     35/19     43/19
0     0     93/38     72/19     -259/38
0     0     -89/38     221/19     625/38

Divide row3 by 93/38
1     -7/10     3/10     1/2     3/5
0     1     4/19     35/19     43/19
0     0     1     48/31     -259/93
0     0     -89/38     221/19     625/38

Add (89/38 * row3) to row4
1     -7/10     3/10     1/2     3/5
0     1     4/19     35/19     43/19
0     0     1     48/31     -259/93
0     0     0     473/31     923/93

Divide row4 by 473/31
1     -7/10     3/10     1/2     3/5
0     1     4/19     35/19     43/19
0     0     1     48/31     -259/93
0     0     0     1     923/1419

Add (-48/31 * row4) to row3
1     -7/10     3/10     1/2     3/5
0     1     4/19     35/19     43/19
0     0     1     0     -5381/1419
0     0     0     1     923/1419

Add (-35/19 * row4) to row2
1     -7/10     3/10     1/2     3/5
0     1     4/19     0     28712/26961
0     0     1     0     -5381/1419
0     0     0     1     923/1419

Add (-1/2 * row4) to row1
1     -7/10     3/10     0     3899/14190
0     1     4/19     0     28712/26961
0     0     1     0     -5381/1419
0     0     0     1     923/1419

Add (-4/19 * row3) to row2
1     -7/10     3/10     0     3899/14190
0     1     0     0     2644/1419
0     0     1     0     -5381/1419
0     0     0     1     923/1419

Add (-3/10 * row3) to row1
1     -7/10     0     0     911/645
0     1     0     0     2644/1419
0     0     1     0     -5381/1419
0     0     0     1     923/1419

Add (7/10 * row2) to row1
1     0     0     0     1285/473
0     1     0     0     2644/1419
0     0     1     0     -5381/1419
0     0     0     1     923/1419