(A,B)=
1 2 -3 -3 0
3 2 -4 2 7
2 -1 0 7 8
r2-r1-r3,r3-2r1
1 2 -3 -3 0
0 1 -1 -2 -1
0 -5 6 13 8
r1-2r2,r3+5r2
1 0 -1 1 2
0 1 -1 -2 -1
0 0 1 3 3
r1+r3,r2+r3
1 0 0 4 5
0 1 0 1 2
0 0 1 3 3
所以 X=
4 5
1 2
3 3