| 1280000 | ÷ | ( | 1 | + | x | ) | − | 1000000 | = | 0 |
| 方程两边同时乘以: | ( | 1 | + | x | ) |
| 1280000 | − | 1000000 | ( | 1 | + | x | ) | = | 0 |
| 1280000 | − | 1000000 | × | 1 | − | 1000000 | x | = | 0 |
| 1280000 | − | 1000000 | − | 1000000 | x | = | 0 |
| 280000 | − | 1000000 | x | = | 0 |
| - | 1000000 | x | = | 0 | − | 280000 |
| - | 1000000 | x | = | - | 280000 |
| 280000 | = | 1000000 | x |
| 1000000 | x | = | 280000 |
| x | = | 280000 | ÷ | 1000000 |
| = | 280000 | × | 1 1000000 |
| = | 7 | × | 1 25 |
| x | = | 7 25 |
| x | = | 0.28 |