> > > > > |
4 1 -2 1 -3 _
2 2 1 2 2 _
3 1 -1 3 -1 _
> > > > > |
4 1 -2 1 -3 .
-6 0 5 0 8 - 2 r[1]
-1 0 1 2 2 - r [1]
> > > > > |
2 1 0 5 1 + 2 r[3]
-1 0 0 -10 -2 - 5 r[3]
-1 0 1 2 2 .
> > > > > |
0 1 0 -15 -3 + 2 r[2]
-1 0 0 -10 -2 .
0 0 1 12 4 - r[2]
> > > > > |
0 1 0 -15 -3 .
1 0 0 10 2 x -1
0 0 1 12 4 .
> > > > > |
1 0 0 10 2 < r [2]
0 1 0 -15 -3 < r [1]
0 0 1 12 4 .