3 -1 0 -1 -1 CB B-ib X1 X2 X3 X4 X5 X6 X7 Xa 12 [3] 0 01 -22-5 X2 0 10 0 -1 1-2 X3 -2 0 0 0 0 1 0 0 0 -1-1 4 1 0 0 1/3 -2/3 X2 1 0 1 0 0 -1 0 0 2/3-4/3 0 00 -1/3-1/3 由此得原问题最优解：X1=4,X2=1,X3=9,X4=X=0 最优值：Z=2 C 3 -1 -1 0 0 -1 -1 CB XB B -1b X1 X2 X3 X4 X5 X6 X7 0 -1 -1 X4 X2 X3 12 1 1 ［3］ 0 0 1 -2 2 -5 0 1 0 0 -1 1 -2 -2 0 1 0 0 0 1 σ 1 0 0 0 -1 -1 -1 3 -1 -1 X1 X2 X3 4 1 9 1 0 0 1/3 -2/3 0 1 0 0 -1 0 0 1 2/3 -4/3 σ 0 0 0 -1/3 -1/3 由此得原问题最优解：X1=4,X2=1, X3=9,X4=X5=0 最优值：Z=2