| x | ( | 1 | + | x | ) | ( | 1 | + | 1 100 | x | ) | = | 25 |
| 方程左边 = | x | × | 1 | ( | 1 | + | 1 100 | x | ) | + | x | x | ( | 1 | + | 1 100 | x | ) |
| = | x | × | 1 | × | 1 | + | x | × | 1 | × | 1 100 | x | + | x | x | ( | 1 | + | 1 100 | x | ) |
| = | x | × | 1 | + | x | × | 1 100 | x | + | x | x | ( | 1 | + | 1 100 | x | ) |
| = | 1 | x | + | x | × | 1 100 | x | + | x | x | × | 1 | + | x | x | × | 1 100 | x |
| 1 | x | + | x | × | 1 100 | x | + | x | x | × | 1 | + | x | x | × | 1 100 | x | = | 25 |