| ( | v | − | 201 10 | ) | ( | - | 301 10 | ) | = | 201 10 | v |
| 方程左边 = | v | ( | - | 301 10 | ) | − | 201 10 | ( | - | 301 10 | ) |
| = | - | v | × | 301 10 | − | 201 10 | ( | - | 301 10 | ) |
| = | - | 301 10 | v | + | 201 10 | × | 301 10 |
| = | - | 301 10 | v | + | 60501 100 |
| - | 301 10 | v | + | 60501 100 | = | 201 10 | v |
| - | 301 10 | v | − | 201 10 | v | = | - | 60501 100 |
| - | 251 5 | v | = | - | 60501 100 |
60501 100 | = | 251 5 | v |
251 5 | v | = | 60501 100 |
| v | = | 60501 100 | ÷ | 251 5 |
| = | 60501 100 | × | 5 251 |
| = | 60501 20 | × | 1 251 |
| v | = | 60501 5020 |
| v | = | 12.051992 |