| x | ÷ | ( | 100 | + | x | ) | = | 491 5000 |
| 方程两边同时乘以: | ( | 100 | + | x | ) |
| x | = | 491 5000 | ( | 100 | + | x | ) |
| x | = | 491 5000 | × | 100 | + | 491 5000 | x |
| x | = | 491 50 | + | 491 5000 | x |
| x | − | 491 5000 | x | = | 491 50 |
4509 5000 | x | = | 491 50 |
| x | = | 491 50 | ÷ | 4509 5000 |
| = | 491 50 | × | 5000 4509 |
| = | 491 | × | 100 4509 |
| x | = | 49100 4509 |
| x | = | 10.889332 |