| 150 | ÷ | V | = | 150 | ÷ | ( | V | + | 10 | ) | + | 1 | ÷ | 2 |
| 方程两边同时乘以: | V | , | ( | V | + | 10 | ) |
| 150 | ( | V | + | 10 | ) | = | 150 | V | + | 1 | ÷ | 2 | × | V | ( | V | + | 10 | ) |
| 150 | V | + | 150 | × | 10 | = | 150 | V | + | 1 | ÷ | 2 | × | V | ( | V | + | 10 | ) |
| 150 | V | + | 150 | × | 10 | = | 150 | V | + | 1 | ÷ | 2 | × | V | V | + | 1 | ÷ | 2 | × | V | × | 10 |
| 150 | V | + | 1500 | = | 150 | V | + | 1 2 | V | V | + | 5 | V |
| 150 | V | + | 1500 | = | 155 | V | + | 1 2 | V | V |