| ( | ( | 4 5 | + | 4 5 | g | ) | ÷ | 10 | ) | + | g | = | 54 500 |
| 方程左边 = | ( | 4 5 | + | 4 5 | g | ) | ÷ | 10 | + | g |
| = | 4 5 | × | 1 10 | + | 4 5 | g | × | 1 10 | + | g |
| = | 2 25 | + | 2 25 | g | + | g |
| = | 2 25 | + | 27 25 | g |
2 25 | + | 27 25 | g | = | 54 500 |
27 25 | g | = | 54 500 | − | 2 25 |
27 25 | g | = | 7 250 |
| g | = | 7 250 | ÷ | 27 25 |
| = | 7 250 | × | 25 27 |
| = | 7 10 | × | 1 27 |
| g | = | 7 270 |
| g | = | 0.025926 |