| ( | X | − | 6448 | − | 10000 | ) | × | 1 10 | − | 2520 | = | X | − | 238308 5 | − | 6448 |
| 方程左边 = | X | × | 1 10 | − | 6448 | × | 1 10 | − | 10000 | × | 1 10 | − | 2520 |
| = | X | × | 1 10 | − | 3224 5 | − | 1000 | − | 2520 |
| = | 1 10 | X | − | 20824 5 |
1 10 | X | − | 20824 5 | = | X | − | 238308 5 | − | 6448 |
| 方程右边 = | X | − | 270548 5 |
1 10 | X | − | 20824 5 | = | X | − | 270548 5 |
1 10 | X | − | X | = | - | 270548 5 | + | 20824 5 |
| - | 9 10 | X | = | - | 270548 5 | + | 20824 5 |
| - | 9 10 | X | = | - | 249724 5 |
249724 5 | = | 9 10 | X |
9 10 | X | = | 249724 5 |
| X | = | 249724 5 | ÷ | 9 10 |
| = | 249724 5 | × | 10 9 |
| = | 249724 | × | 2 9 |
| X | = | 499448 9 |
| X | = | 55494.222222 |