| 25000 | = | 7065957 5000 | + | ( | 638 | ( | 1 | + | g | ) | ÷ | ( | 8 100 | − | g | ) | ) | × | 7513 10000 |
| 25000 | = | 7065957 5000 | + | 638 | ( | 1 | + | g | ) | ÷ | ( | 8 100 | − | g | ) | × | 7513 10000 |
| 25000 | = | 7065957 5000 | + | 2396647 5000 | ( | 1 | + | g | ) | ÷ | ( | 8 100 | − | g | ) |
| 方程两边同时乘以: | ( | 8 100 | − | g | ) |
| 25000 | ( | 8 100 | − | g | ) | = | 7065957 5000 | ( | 8 100 | − | g | ) | + | 2396647 5000 | ( | 1 | + | g | ) |
| 25000 | × | 8 100 | − | 25000 | g | = | 7065957 5000 | ( | 8 100 | − | g | ) | + | 2396647 5000 | ( | 1 | + | g | ) |
| 25000 | × | 8 100 | − | 25000 | g | = | 7065957 5000 | × | 8 100 | − | 7065957 5000 | g | + | 2396647 5000 | ( | 1 | + | g | ) |
| 2000 | − | 25000 | g | = | 7065957 62500 | − | 7065957 5000 | g | + | 2396647 5000 | ( | 1 | + | g | ) |
| 2000 | − | 25000 | g | = | 7065957 62500 | − | 7065957 5000 | g | + | 2396647 5000 | × | 1 | + | 2396647 5000 | g |
| 2000 | − | 25000 | g | = | 7065957 62500 | − | 7065957 5000 | g | + | 2396647 5000 | + | 2396647 5000 | g |