C_j			30	50	30	0	0	0	$b / a_{i k}$
C_b	X_b	b	x₁	x₂	x₃	x₄	x₅	x₆
30	x₃	700	27/20	0	1	3/20	0	−1/25
0	x₅	10,000/3	−11	0	0	0	1	−6/5
50	x₂	400/3	1/15	1	0	−1/15	0	3/75
检验行		83,000/3	83/6	0	0	7/6	0	4/5	无负检验数