4889 5000 | ( | 1 | − | X | ) | + | 2039 5000 | X | = | 2431 5000 |
| 方程左边 = | 4889 5000 | × | 1 | − | 4889 5000 | X | + | 2039 5000 | X |
| = | 4889 5000 | − | 4889 5000 | X | + | 2039 5000 | X |
| = | 4889 5000 | − | 57 100 | X |
4889 5000 | − | 57 100 | X | = | 2431 5000 |
| - | 57 100 | X | = | 2431 5000 | − | 4889 5000 |
| - | 57 100 | X | = | - | 1229 2500 |
1229 2500 | = | 57 100 | X |
57 100 | X | = | 1229 2500 |
| X | = | 1229 2500 | ÷ | 57 100 |
| = | 1229 2500 | × | 100 57 |
| = | 1229 25 | × | 1 57 |
| X | = | 1229 1425 |
| X | = | 0.862456 |