| 20 | x | ÷ | ( | 20 | + | 100 | x | ) | = | 181 1000 |
| 方程两边同时乘以: | ( | 20 | + | 100 | x | ) |
| 20 | x | = | 181 1000 | ( | 20 | + | 100 | x | ) |
| 20 | x | = | 181 1000 | × | 20 | + | 181 1000 | × | 100 | x |
| 20 | x | = | 181 50 | + | 181 10 | x |
| 20 | x | − | 181 10 | x | = | 181 50 |
19 10 | x | = | 181 50 |
| x | = | 181 50 | ÷ | 19 10 |
| = | 181 50 | × | 10 19 |
| = | 181 5 | × | 1 19 |
| x | = | 181 95 |
| x | = | 1.905263 |