7 20 | = | 1 | ÷ | 2 | × | ( | 32821 100 | ÷ | 48023 100 | + | x | ÷ | 48023 100 | ) | − | 1 |
| 方程右边 = | 1 2 | ( | 32821 100 | ÷ | 48023 100 | + | x | ÷ | 48023 100 | ) | − | 1 |
7 20 | = | 1 2 | ( | 32821 100 | ÷ | 48023 100 | + | x | ÷ | 48023 100 | ) | − | 1 |
| 方程右边 = | 1 2 | × | 32821 100 | ÷ | 48023 100 | + | 1 2 | x | ÷ | 48023 100 | − | 1 |
| = | 32821 96046 | + | 50 48023 | x | − | 1 |
| = | - | 63225 96046 | + | 50 48023 | x |
7 20 | = | - | 63225 96046 | + | 50 48023 | x |
| - | 50 48023 | x | = | - | 63225 96046 | − | 7 20 |
| - | 50 48023 | x | = | - | 968411 960460 |
968411 960460 | = | 50 48023 | x |
50 48023 | x | = | 968411 960460 |
| x | = | 968411 960460 | ÷ | 50 48023 |
| = | 968411 960460 | × | 48023 50 |
| x | = | 46506001453 48023000 |