| - | 99 | X | − | 369 500 | X | = | 257 1000 | − | 45 |
| 方程左边 = | - | 49869 500 | X |
| - | 49869 500 | X | = | 257 1000 | − | 45 |
| 方程右边 = | - | 44743 1000 |
| - | 49869 500 | X | = | - | 44743 1000 |
44743 1000 | = | 49869 500 | X |
49869 500 | X | = | 44743 1000 |
| X | = | 44743 1000 | ÷ | 49869 500 |
| = | 44743 1000 | × | 500 49869 |
| = | 44743 2 | × | 1 49869 |
| X | = | 44743 99738 |
| X | = | 0.448605 |