| 50 | X | − | 1 100 | X | × | 2 | = | 5000 | + | 9 100 | X | × | 2 | − | 10 | X |
| 方程左边 = | 50 | X | − | 1 50 | X |
| = | 2499 50 | X |
2499 50 | X | = | 5000 | + | 9 100 | X | × | 2 | − | 10 | X |
| 方程右边 = | 5000 | + | 9 50 | X | − | 10 | X |
| = | 5000 | − | 491 50 | X |
2499 50 | X | = | 5000 | − | 491 50 | X |
2499 50 | X | + | 491 50 | X | = | 5000 |
299 5 | X | = | 5000 |
| X | = | 5000 | ÷ | 299 5 |
| = | 5000 | × | 5 299 |
| X | = | 25000 299 |
| X | = | 83.61204 |