| ( | 2904 | − | x | ) | × | 4 25 | = | x |
| 方程左边 = | 2904 | × | 4 25 | − | x | × | 4 25 |
| = | 11616 25 | − | x | × | 4 25 |
11616 25 | − | 4 25 | x | = | x |
| - | 4 25 | x | − | x | = | - | 11616 25 |
| - | 29 25 | x | = | - | 11616 25 |
11616 25 | = | 29 25 | x |
29 25 | x | = | 11616 25 |
| x | = | 11616 25 | ÷ | 29 25 |
| = | 11616 25 | × | 25 29 |
| = | 11616 | × | 1 29 |
| x | = | 11616 29 |
| x | = | 400.551724 |