27 250 | − | ( | 4 5 | + | 4 5 | g | ) | ÷ | 10 | = | g |
| 方程左边 = | 27 250 | − | 4 5 | × | 1 10 | − | 4 5 | g | × | 1 10 |
| = | 27 250 | − | 2 25 | − | 2 25 | g |
| = | 7 250 | − | 2 25 | g |
7 250 | − | 2 25 | g | = | g |
| - | 2 25 | g | − | g | = | - | 7 250 |
| - | 27 25 | g | = | - | 7 250 |
7 250 | = | 27 25 | g |
27 25 | g | = | 7 250 |
| g | = | 7 250 | ÷ | 27 25 |
| = | 7 250 | × | 25 27 |
| = | 7 10 | × | 1 27 |
| g | = | 7 270 |
| g | = | 0.025926 |