| 150 | ÷ | v | − | 1 2 | = | 150 | ÷ | ( | v | + | 10 | ) |
| 方程两边同时乘以: | v | , | ( | v | + | 10 | ) |
| 150 | ( | v | + | 10 | ) | − | 1 2 | v | ( | v | + | 10 | ) | = | 150 | v |
| 150 | v | + | 150 | × | 10 | − | 1 2 | v | ( | v | + | 10 | ) | = | 150 | v |
| 150 | v | + | 1500 | − | 1 2 | v | ( | v | + | 10 | ) | = | 150 | v |
| 150 | v | + | 1500 | − | 1 2 | v | v | − | 1 2 | v | × | 10 | = | 150 | v |
| 150 | v | + | 1500 | − | 1 2 | v | v | − | 5 | v | = | 150 | v |
| 145 | v | + | 1500 | − | 1 2 | v | v | = | 150 | v |