| ( | 1 50 | − | ( | 1 | − | g | ) | ( | g | + | 1 50 | ÷ | g | ) | ) | ÷ | g | = | 0 |
| 方程两边同时乘以: | g |
| ( | 1 50 | − | ( | 1 | − | g | ) | ( | g | + | 1 50 | ÷ | g | ) | ) | = | 0 |
1 50 | − | ( | 1 | − | g | ) | ( | g | + | 1 50 | ÷ | g | ) | = | 0 |
1 50 | − | 1 | ( | g | + | 1 50 | ÷ | g | ) | + | g | ( | g | + | 1 50 | ÷ | g | ) | = | 0 |
1 50 | − | 1 | g | − | 1 | × | 1 50 | ÷ | g | + | g | ( | g | + | 1 50 | ÷ | g | ) | = | 0 |
1 50 | − | 1 | g | − | 1 50 | ÷ | g | + | g | ( | g | + | 1 50 | ÷ | g | ) | = | 0 |
| 方程两边同时乘以: | g |
1 50 | g | − | 1 | g | g | − | 1 50 | + | g | ( | g | + | 1 50 | ÷ | g | ) | g | = | 0 |
1 50 | g | − | 1 | g | g | − | 1 50 | + | g | g | g | + | g | × | 1 50 | ÷ | g | = | 0 |