| ( | 226803 10000 | − | x | ) | ÷ | 4001 2000 | = | 17 500 |
| 方程左边 = | 226803 10000 | × | 2000 4001 | − | x | × | 2000 4001 |
| = | 226803 20005 | − | x | × | 2000 4001 |
226803 20005 | − | 2000 4001 | x | = | 17 500 |
| - | 2000 4001 | x | = | 17 500 | − | 226803 20005 |
| - | 2000 4001 | x | = | - | 22612283 2000500 |
22612283 2000500 | = | 2000 4001 | x |
2000 4001 | x | = | 22612283 2000500 |
| x | = | 22612283 2000500 | ÷ | 2000 4001 |
| = | 22612283 2000500 | × | 4001 2000 |
| x | = | 90471744283 4001000000 |