| X | ( | 1 | − | 7 100 | ) | ( | 1 | − | 5 200 | ) | ( | 1 | − | 4 100 | ) | ( | 1 | − | 4 100 | ) | = | 868 125 |
| 方程左边 = | X | × | 1 | ( | 1 | − | 5 200 | ) | ( | 1 | − | 4 100 | ) | ( | 1 | − | 4 100 | ) | − | X | × | 7 100 | ( | 1 | − | 5 200 | ) | ( | 1 | − | 4 100 | ) | ( | 1 | − | 4 100 | ) |
| = | X | × | 1 | × | 1 | ( | 1 | − | 4 100 | ) | ( | 1 | − | 4 100 | ) | − | X | × | 1 | × | 5 200 | ( | 1 | − | 4 100 | ) | ( | 1 | − | 4 100 | ) | − | X | × | 7 100 |
| = | X | × | 1 | ( | 1 | − | 4 100 | ) | ( | 1 | − | 4 100 | ) | − | X | × | 1 40 | ( | 1 | − | 4 100 | ) | ( | 1 | − | 4 100 | ) | − | X | × | 7 100 | ( | 1 | − | 5 200 | ) | ( | 1 | − | 4 100 | ) |
| = | X | × | 1 | × | 1 | ( | 1 | − | 4 100 | ) | − | X | × | 1 | × | 4 100 | ( | 1 | − | 4 100 | ) | − | X | × | 1 40 | ( | 1 | − | 4 100 | ) | ( | 1 | − | 4 100 | ) |
| = | X | × | 1 | ( | 1 | − | 4 100 | ) | − | X | × | 1 25 | ( | 1 | − | 4 100 | ) | − | X | × | 1 40 | ( | 1 | − | 4 100 | ) | ( | 1 | − | 4 100 | ) | − | X | × | 7 100 |
| = | X | × | 1 | × | 1 | − | X | × | 1 | × | 4 100 | − | X | × | 1 25 | ( | 1 | − | 4 100 | ) | − | X | × | 1 40 | ( | 1 | − | 4 100 | ) |
| = | X | × | 1 | − | X | × | 1 25 | − | X | × | 1 25 | ( | 1 | − | 4 100 | ) | − | X | × | 1 40 | ( | 1 | − | 4 100 | ) | ( | 1 | − | 4 100 | ) | − | X |
| = | 24 25 | X | − | X | × | 1 25 | ( | 1 | − | 4 100 | ) | − | X | × | 1 40 | ( | 1 | − | 4 100 | ) | ( | 1 | − | 4 100 | ) | − | X | × | 7 100 | ( | 1 | − | 5 200 | ) |
| = | 24 25 | X | − | X | × | 1 25 | × | 1 | + | X | × | 1 25 | × | 4 100 | − | X | × | 1 40 | ( | 1 | − | 4 100 | ) | ( | 1 | − | 4 100 | ) |
| = | 24 25 | X | − | X | × | 1 25 | + | X | × | 1 625 | − | X | × | 1 40 | ( | 1 | − | 4 100 | ) | ( | 1 | − | 4 100 | ) | − | X | × | 7 100 |
| = | 576 625 | X | − | X | × | 1 40 | ( | 1 | − | 4 100 | ) | ( | 1 | − | 4 100 | ) | − | X | × | 7 100 | ( | 1 | − | 5 200 | ) | ( | 1 | − | 4 100 | ) | ( | 1 | − | 4 100 | ) |
| = | 576 625 | X | − | X | × | 1 40 | × | 1 | ( | 1 | − | 4 100 | ) | + | X | × | 1 40 | × | 4 100 | ( | 1 | − | 4 100 | ) | − | X | × | 7 100 |
| = | 576 625 | X | − | X | × | 1 40 | ( | 1 | − | 4 100 | ) | + | X | × | 1 1000 | ( | 1 | − | 4 100 | ) | − | X | × | 7 100 | ( | 1 | − | 5 200 | ) | ( | 1 | − | 4 100 | ) |
| = | 576 625 | X | − | X | × | 1 40 | × | 1 | + | X | × | 1 40 | × | 4 100 | + | X | × | 1 1000 | ( | 1 | − | 4 100 | ) | − | X |
| = | 576 625 | X | − | X | × | 1 40 | + | X | × | 1 1000 | + | X | × | 1 1000 | ( | 1 | − | 4 100 | ) | − | X | × | 7 100 | ( | 1 | − | 5 200 | ) |
| = | 561 625 | X | + | X | × | 1 1000 | ( | 1 | − | 4 100 | ) | − | X | × | 7 100 | ( | 1 | − | 5 200 | ) | ( | 1 | − | 4 100 | ) | ( | 1 | − | 4 100 | ) |
| = | 561 625 | X | + | X | × | 1 1000 | × | 1 | − | X | × | 1 1000 | × | 4 100 | − | X | × | 7 100 | ( | 1 | − | 5 200 | ) | ( | 1 | − | 4 100 | ) |
| = | 561 625 | X | + | X | × | 1 1000 | − | X | × | 1 25000 | − | X | × | 7 100 | ( | 1 | − | 5 200 | ) | ( | 1 | − | 4 100 | ) | ( | 1 | − | 4 100 | ) |
| = | 2808 3125 | X | − | X | × | 7 100 | ( | 1 | − | 5 200 | ) | ( | 1 | − | 4 100 | ) | ( | 1 | − | 4 100 | ) |
| = | 2808 3125 | X | − | X | × | 7 100 | × | 1 | ( | 1 | − | 4 100 | ) | ( | 1 | − | 4 100 | ) | + | X | × | 7 100 | × | 5 200 | ( | 1 | − | 4 100 | ) | ( | 1 | − | 4 100 | ) |
| = | 2808 3125 | X | − | X | × | 7 100 | ( | 1 | − | 4 100 | ) | ( | 1 | − | 4 100 | ) | + | X | × | 7 4000 | ( | 1 | − | 4 100 | ) | ( | 1 | − | 4 100 | ) |
| = | 2808 3125 | X | − | X | × | 7 100 | × | 1 | ( | 1 | − | 4 100 | ) | + | X | × | 7 100 | × | 4 100 | ( | 1 | − | 4 100 | ) | + | X | × | 7 4000 |
| = | 2808 3125 | X | − | X | × | 7 100 | ( | 1 | − | 4 100 | ) | + | X | × | 7 2500 | ( | 1 | − | 4 100 | ) | + | X | × | 7 4000 | ( | 1 | − | 4 100 | ) | ( | 1 | − | 4 100 | ) |
| = | 2808 3125 | X | − | X | × | 7 100 | × | 1 | + | X | × | 7 100 | × | 4 100 | + | X | × | 7 2500 | ( | 1 | − | 4 100 | ) | + | X |
| = | 2808 3125 | X | − | X | × | 7 100 | + | X | × | 7 2500 | + | X | × | 7 2500 | ( | 1 | − | 4 100 | ) | + | X | × | 7 4000 | ( | 1 | − | 4 100 | ) |