| ( | 249 5 | − | X | ) | ( | 2739 | ÷ | 480 | × | 1410 | ÷ | 1000 | ) | ÷ | 2260 | = | 623 1000 |
| 方程左边 = | 249 5 | ( | 2739 | ÷ | 480 | × | 1410 | ÷ | 1000 | ) | × | 1 2260 | − | X | ( | 2739 | ÷ | 480 | × | 1410 | ÷ | 1000 | ) | × | 1 2260 |
| = | 249 11300 | ( | 2739 | ÷ | 480 | × | 1410 | ÷ | 1000 | ) | − | X | ( | 2739 | ÷ | 480 | × | 1410 | ÷ | 1000 | ) | × | 1 2260 |
| = | 249 11300 | × | 2739 | ÷ | 480 | × | 1410 | ÷ | 1000 | − | X | ( | 2739 | ÷ | 480 | × | 1410 | ÷ | 1000 | ) | × | 1 2260 |
| = | 32054517 180800000 | − | X | ( | 2739 | ÷ | 480 | × | 1410 | ÷ | 1000 | ) | × | 1 2260 |
| = | 32054517 180800000 | − | X | × | 2739 | ÷ | 480 | × | 1410 | ÷ | 1000 | × | 1 2260 |
| = | 32054517 180800000 | − | X | × | 128733 36160000 |
32054517 180800000 | − | 128733 36160000 | X | = | 623 1000 |
| - | 128733 36160000 | X | = | 623 1000 | − | 32054517 180800000 |