| ( | 1 | + | g | ) | ÷ | g | × | 63 2000 | = | 121 200 |
| 方程两边同时乘以: | g |
| ( | 1 | + | g | ) | × | 63 2000 | = | 121 200 | g |
| 1 | × | 63 2000 | + | g | × | 63 2000 | = | 121 200 | g |
63 2000 | + | g | × | 63 2000 | = | 121 200 | g |
63 2000 | g | − | 121 200 | g | = | - | 63 2000 |
| - | 1147 2000 | g | = | - | 63 2000 |
63 2000 | = | 1147 2000 | g |
1147 2000 | g | = | 63 2000 |
| g | = | 63 2000 | ÷ | 1147 2000 |
| = | 63 2000 | × | 2000 1147 |
| = | 63 | × | 1 1147 |
| g | = | 63 1147 |
| g | = | 0.054926 |