| ( | 239 5 | − | X | ) | ( | 2739 | ÷ | 480 | × | 2260 | ÷ | 1000 | ) | = | ( | 293 5 | − | X | ) | ( | 2739 | ÷ | 480 | × | 1410 | ÷ | 1000 | ) | × | 1410 | ÷ | 2260 |
| 方程左边 = | 239 5 | ( | 2739 | ÷ | 480 | × | 2260 | ÷ | 1000 | ) | − | X | ( | 2739 | ÷ | 480 | × | 2260 | ÷ | 1000 | ) |
| = | 239 5 | × | 2739 | ÷ | 480 | × | 2260 | ÷ | 1000 | − | X | ( | 2739 | ÷ | 480 | × | 2260 | ÷ | 1000 | ) |
| = | 24657391 40000 | − | X | ( | 2739 | ÷ | 480 | × | 2260 | ÷ | 1000 | ) |
| = | 24657391 40000 | − | X | × | 2739 | ÷ | 480 | × | 2260 | ÷ | 1000 |
| = | 24657391 40000 | − | X | × | 103169 8000 |
24657391 40000 | − | 103169 8000 | X | = | ( | 293 5 | − | X | ) | ( | 2739 | ÷ | 480 | × | 1410 | ÷ | 1000 | ) | × | 1410 | ÷ | 2260 |
| 方程右边 = | ( | 293 5 | − | X | ) | ( | 2739 | ÷ | 480 | × | 1410 | ÷ | 1000 | ) | × | 141 226 |
24657391 40000 | − | 103169 8000 | X | = | ( | 293 5 | − | X | ) | ( | 2739 | ÷ | 480 | × | 1410 | ÷ | 1000 | ) | × | 141 226 |
| 方程右边 = | 293 5 | ( | 2739 | ÷ | 480 | × | 1410 | ÷ | 1000 | ) | × | 141 226 | − | X | ( | 2739 | ÷ | 480 | × | 1410 | ÷ | 1000 | ) | × | 141 226 |
| = | 41313 1130 | ( | 2739 | ÷ | 480 | × | 1410 | ÷ | 1000 | ) | − | X | ( | 2739 | ÷ | 480 | × | 1410 | ÷ | 1000 | ) | × | 141 226 |
| = | 41313 1130 | × | 2739 | ÷ | 480 | × | 1410 | ÷ | 1000 | − | X | ( | 2739 | ÷ | 480 | × | 1410 | ÷ | 1000 | ) | × | 141 226 |