| x | ÷ | 229 1000 | = | ( | 18 | − | x | ) | ÷ | ( | - | 29 1000 | ) |
| 方程两边同时乘以: | ( | - | 29 1000 | ) |
| x | ÷ | 229 1000 | × | ( | - | 29 1000 | ) | = | ( | 18 | − | x | ) |
| - | x | ÷ | 229 1000 | × | 29 1000 | = | ( | 18 | − | x | ) |
| - | x | ÷ | 229 1000 | × | 29 1000 | = | 18 | − | x |
| - | x | × | 29 229 | = | 18 | − | x |
| - | 29 229 | x | + | x | = | 18 |
| - | - | 200 229 | x | = | 18 |
| - | 18 | = | - | 200 229 | x |
| - | 200 229 | x | = | - | 18 |
| x | = | 18 | ÷ | 200 229 |
| = | 18 | × | 229 200 |
| = | 9 | × | 229 100 |
| x | = | 2061 100 |
| x | = | 20.61 |