1 2 5 3
-2 1 0 -1
3 2 7 5
-1 -2 -5 -3
2 -3 -4 -1
r5+r2,r4+r1,r2+2r1,r3-3r1
1 2 5 3
0 5 10 5
0 -4 -8 -4
0 0 0 0
0 -2 -4 -2
r2*(1/2),r3+4r2,r5+2r2
1 2 5 3
0 1 2 1
0 0 0 0
0 0 0 0
0 0 0 0
1 2 5 3
-2 1 0 -1
3 2 7 5
-1 -2 -5 -3
2 -3 -4 -1
r5+r2,r4+r1,r2+2r1,r3-3r1
1 2 5 3
0 5 10 5
0 -4 -8 -4
0 0 0 0
0 -2 -4 -2
r2*(1/2),r3+4r2,r5+2r2
1 2 5 3
0 1 2 1
0 0 0 0
0 0 0 0
0 0 0 0