3 5 | ( | 1 | + | G | ) | ÷ | 12 | + | G | = | 11 100 |
| 方程左边 = | 1 20 | ( | 1 | + | G | ) | + | G |
1 20 | ( | 1 | + | G | ) | + | G | = | 11 100 |
| 方程左边 = | 1 20 | × | 1 | + | 1 20 | G | + | G |
| = | 1 20 | + | 1 20 | G | + | G |
| = | 1 20 | + | 21 20 | G |
1 20 | + | 21 20 | G | = | 11 100 |
21 20 | G | = | 11 100 | − | 1 20 |
21 20 | G | = | 3 50 |
| G | = | 3 50 | ÷ | 21 20 |
| = | 3 50 | × | 20 21 |
| = | 1 5 | × | 2 7 |
| G | = | 2 35 |
| G | = | 0.057143 |