227 100 | = | 99 10 | ÷ | ( | 99 10 | − | X | ) |
| 方程两边同时乘以: | ( | 99 10 | − | X | ) |
227 100 | ( | 99 10 | − | X | ) | = | 99 10 |
227 100 | × | 99 10 | − | 227 100 | X | = | 99 10 |
22473 1000 | − | 227 100 | X | = | 99 10 |
| - | 227 100 | X | = | 99 10 | − | 22473 1000 |
| - | 227 100 | X | = | - | 12573 1000 |
12573 1000 | = | 227 100 | X |
227 100 | X | = | 12573 1000 |
| X | = | 12573 1000 | ÷ | 227 100 |
| = | 12573 1000 | × | 100 227 |
| = | 12573 10 | × | 1 227 |
| X | = | 12573 2270 |
| X | = | 5.538767 |