| X | − | 1 10 | X | − | 1 20 | X | − | 3 | = | 5569 10 | + | 3 20 | × | 5569 10 |
| 方程左边 = | 17 20 | X | − | 3 |
17 20 | X | − | 3 | = | 5569 10 | + | 3 20 | × | 5569 10 |
| 方程右边 = | 5569 10 | + | 16707 200 |
| = | 128087 200 |
17 20 | X | − | 3 | = | 128087 200 |
17 20 | X | = | 128087 200 | + | 3 |
17 20 | X | = | 128687 200 |
| X | = | 128687 200 | ÷ | 17 20 |
| = | 128687 200 | × | 20 17 |
| = | 128687 10 | × | 1 17 |
| X | = | 128687 170 |
| X | = | 756.982353 |