| x | ÷ | ( | 1 100 | − | x | ) | = | 11 500 |
| 方程两边同时乘以: | ( | 1 100 | − | x | ) |
| x | = | 11 500 | ( | 1 100 | − | x | ) |
| x | = | 11 500 | × | 1 100 | − | 11 500 | x |
| x | = | 11 50000 | − | 11 500 | x |
| x | + | 11 500 | x | = | 11 50000 |
511 500 | x | = | 11 50000 |
| x | = | 11 50000 | ÷ | 511 500 |
| = | 11 50000 | × | 500 511 |
| = | 11 100 | × | 1 511 |
| x | = | 11 51100 |
| x | = | 0.000215 |