| ( | 249 5 | − | X | ) | ( | 2739 | ÷ | 480 | × | 1410 | ÷ | 1000 | ) | × | 2260 | ÷ | 1410 | = | ( | 303 5 | − | X | ) | ( | 2739 | ÷ | 480 | × | 2260 | ÷ | 1000 | ) |
| 方程左边 = | ( | 249 5 | − | X | ) | ( | 2739 | ÷ | 480 | × | 1410 | ÷ | 1000 | ) | × | 226 141 |
| ( | 249 5 | − | X | ) | ( | 2739 | ÷ | 480 | × | 1410 | ÷ | 1000 | ) | × | 226 141 | = | ( | 303 5 | − | X | ) | ( | 2739 | ÷ | 480 | × | 2260 | ÷ | 1000 | ) |
| 方程左边 = | 249 5 | ( | 2739 | ÷ | 480 | × | 1410 | ÷ | 1000 | ) | × | 226 141 | − | X | ( | 2739 | ÷ | 480 | × | 1410 | ÷ | 1000 | ) | × | 226 141 |
| = | 18758 235 | ( | 2739 | ÷ | 480 | × | 1410 | ÷ | 1000 | ) | − | X | ( | 2739 | ÷ | 480 | × | 1410 | ÷ | 1000 | ) | × | 226 141 |
| = | 18758 235 | × | 2739 | ÷ | 480 | × | 1410 | ÷ | 1000 | − | X | ( | 2739 | ÷ | 480 | × | 1410 | ÷ | 1000 | ) | × | 226 141 |