| x | ÷ | 291 1000 | = | ( | 18 | − | x | ) | ÷ | 91 1000 |
| 方程右边 = | 18 | × | 1000 91 | − | x | × | 1000 91 |
| = | 18000 91 | − | x | × | 1000 91 |
1000 291 | x | = | 18000 91 | − | 1000 91 | x |
1000 291 | x | + | 1000 91 | x | = | 18000 91 |
382000 26481 | x | = | 18000 91 |
| x | = | 18000 91 | ÷ | 382000 26481 |
| = | 18000 91 | × | 26481 382000 |
| = | 9 | × | 291 191 |
| x | = | 2619 191 |
| x | = | 13.712042 |