1 5 | = | 2 500 | − | ( | 1 | + | g | ) | ÷ | g | × | 7 100 |
| 方程两边同时乘以: | g |
1 5 | g | = | 2 500 | g | − | ( | 1 | + | g | ) | × | 7 100 |
1 5 | g | = | 2 500 | g | − | 1 | × | 7 100 | − | g | × | 7 100 |
1 5 | g | = | 2 500 | g | − | 7 100 | − | g | × | 7 100 |
1 5 | g | = | - | 33 500 | g | − | 7 100 |
1 5 | g | + | 33 500 | g | = | - | 7 100 |
133 500 | g | = | - | 7 100 |
| g | = | - | 7 100 | ÷ | 133 500 |
| = | - | 7 100 | × | 500 133 |
| = | - | 1 | × | 5 19 |
| g | = | - | 5 19 |
| g | = | - 0.263158 |