1 20 | = | 1 | ÷ | 2 | × | ( | x | ÷ | 4831 100 | ) | − | 1 |
| 方程右边 = | 1 2 | ( | x | ÷ | 4831 100 | ) | − | 1 |
1 20 | = | 1 2 | ( | x | ÷ | 4831 100 | ) | − | 1 |
| 方程右边 = | 1 2 | x | ÷ | 4831 100 | − | 1 |
| = | 50 4831 | x | − | 1 |
1 20 | = | 50 4831 | x | − | 1 |
| - | 50 4831 | x | = | - | 1 | − | 1 20 |
| - | 50 4831 | x | = | - | 21 20 |
21 20 | = | 50 4831 | x |
50 4831 | x | = | 21 20 |
| x | = | 21 20 | ÷ | 50 4831 |
| = | 21 20 | × | 4831 50 |
| x | = | 101451 1000 |
| x | = | 101.451 |