Basic Variables | x1 | x2 | x3 | x4 | Sign of inequality (Optional) | bi |
−4 | −3 | 0 | 0 | ≤ | 0 | |
1 | 1 | 0 | 0 | ≤ | 50 | |
1 | 2 | −1 | 0 | ≤ | 80 | |
| 3 | 2 | 0 | −1 | ≤ | 40 |