3177601 100 | X | × | 1 5 | + | 3177601 100 | ( | 1 | − | X | ) | × | 7 2 | = | 11121603 100 |
方程左边 = | 3177601 500 | X | + | 22243207 200 | ( | 1 | − | X | ) |
3177601 500 | X | + | 22243207 200 | ( | 1 | − | X | ) | = | 11121603 100 |
方程左边 = | 3177601 500 | X | + | 22243207 200 | × | 1 | − | 22243207 200 | X |
= | 3177601 500 | X | + | 22243207 200 | − | 22243207 200 | X |