| X | ÷ | ( | X | + | 223 100 | ) | = | 1 20 |
| 方程两边同时乘以: | ( | X | + | 223 100 | ) |
| X | = | 1 20 | ( | X | + | 223 100 | ) |
| X | = | 1 20 | X | + | 1 20 | × | 223 100 |
| X | = | 1 20 | X | + | 223 2000 |
| X | − | 1 20 | X | = | 223 2000 |
19 20 | X | = | 223 2000 |
| X | = | 223 2000 | ÷ | 19 20 |
| = | 223 2000 | × | 20 19 |
| = | 223 100 | × | 1 19 |
| X | = | 223 1900 |
| X | = | 0.117368 |