10 100 | − | x | ÷ | 10 100 | − | 15 100 | = | 8300 | ÷ | 122210 |
| 方程左边 = | - | 1 20 | − | 100 10 | x |
| - | 1 20 | − | 100 10 | x | = | 8300 | ÷ | 122210 |
| 方程右边 = | 830 12221 |
| - | 1 20 | − | 100 10 | x | = | 830 12221 |
| - | 100 10 | x | = | 830 12221 | + | 1 20 |
| - | 100 10 | x | = | 28821 244420 |
| - | 28821 244420 | = | 100 10 | x |
100 10 | x | = | - | 28821 244420 |
| x | = | - | 28821 244420 | ÷ | 100 10 |
| = | - | 28821 244420 | × | 10 100 |
| = | - | 28821 24442 | × | 1 100 |
| x | = | - | 28821 2444200 |
| x | = | - 0.011792 |