4 5 | ( | 1 | + | X | ) | ÷ | 10 | + | X | = | 54 5 |
| 方程左边 = | 2 25 | ( | 1 | + | X | ) | + | X |
2 25 | ( | 1 | + | X | ) | + | X | = | 54 5 |
| 方程左边 = | 2 25 | × | 1 | + | 2 25 | X | + | X |
| = | 2 25 | + | 2 25 | X | + | X |
| = | 2 25 | + | 27 25 | X |
2 25 | + | 27 25 | X | = | 54 5 |
27 25 | X | = | 54 5 | − | 2 25 |
27 25 | X | = | 268 25 |
| X | = | 268 25 | ÷ | 27 25 |
| = | 268 25 | × | 25 27 |
| = | 268 | × | 1 27 |
| X | = | 268 27 |
| X | = | 9.925926 |