| ( | X | − | 11 2500 | ) | × | 343 1000 | × | 100 | ÷ | 2503 5000 | = | 7 25 |
| 方程左边 = | ( | X | − | 11 2500 | ) | × | 171500 2503 |
| ( | X | − | 11 2500 | ) | × | 171500 2503 | = | 7 25 |
| 方程左边 = | X | × | 171500 2503 | − | 11 2500 | × | 171500 2503 |
| = | X | × | 171500 2503 | − | 3773 12515 |
171500 2503 | X | − | 3773 12515 | = | 7 25 |
171500 2503 | X | = | 7 25 | + | 3773 12515 |
171500 2503 | X | = | 36386 62575 |
| X | = | 36386 62575 | ÷ | 171500 2503 |
| = | 36386 62575 | × | 2503 171500 |
| = | 2599 62575 | × | 2503 12250 |
| X | = | 6505297 766543750 |
| X | = | 2599 306250 |
| X | = | 0.008487 |