| ( | 6 5 | ( | 1 | + | X | ) | ) | ÷ | 171 10 | + | X | = | 12 100 |
| 方程左边 = | 6 5 | ( | 1 | + | X | ) | × | 10 171 | + | X |
| = | 4 57 | ( | 1 | + | X | ) | + | X |
| = | 4 57 | × | 1 | + | 4 57 | X | + | X |
| = | 4 57 | + | 4 57 | X | + | X |
| = | 4 57 | + | 61 57 | X |
4 57 | + | 61 57 | X | = | 12 100 |
61 57 | X | = | 12 100 | − | 4 57 |
61 57 | X | = | 71 1425 |
| X | = | 71 1425 | ÷ | 61 57 |
| = | 71 1425 | × | 57 61 |
| = | 71 25 | × | 1 61 |
| X | = | 71 1525 |
| X | = | 0.046557 |