| ( | 260 | × | 63 | × | 2 | − | X | ) | × | 9 10 | = | 636968 25 |
| 方程左边 = | 260 | × | 63 | × | 2 | × | 9 10 | − | X | × | 9 10 |
| = | 29484 | − | X | × | 9 10 |
| 29484 | − | 9 10 | X | = | 636968 25 |
| - | 9 10 | X | = | 636968 25 | − | 29484 |
| - | 9 10 | X | = | - | 100132 25 |
100132 25 | = | 9 10 | X |
9 10 | X | = | 100132 25 |
| X | = | 100132 25 | ÷ | 9 10 |
| = | 100132 25 | × | 10 9 |
| = | 100132 5 | × | 2 9 |
| X | = | 200264 45 |
| X | = | 4450.311111 |