| 450 | ÷ | x | − | 440 | ÷ | x | − | 10 | = | 1 | ÷ | 2 |
| 方程两边同时乘以: | x |
| 450 | − | 440 | ÷ | 1 | × | 1 | − | 10 | x | = | 1 | ÷ | 2 | × | x |
| - | 10 | x | − | 1 | ÷ | 2 | × | x | = | - | 450 | + | 440 | ÷ | 1 | × | 1 |
| - | 10 | x | − | 1 2 | x | = | - | 450 | + | 440 | ÷ | 1 | × | 1 |
| - | 10 | x | − | 1 2 | x | = | - | 450 | + | 440 |
| - | 21 2 | x | = | - | 450 | + | 440 |
| - | 21 2 | x | = | - | 10 |
| 10 | = | 21 2 | x |
21 2 | x | = | 10 |
| x | = | 10 | ÷ | 21 2 |
| = | 10 | × | 2 21 |
| x | = | 20 21 |
| x | = | 0.952381 |