| ( | 1053 20 | − | X | ) | ÷ | X | = | 809 5000 |
| 方程两边同时乘以: | X |
| ( | 1053 20 | − | X | ) | = | 809 5000 | X |
1053 20 | − | X | = | 809 5000 | X |
| - | X | − | 809 5000 | X | = | - | 1053 20 |
| - | 5809 5000 | X | = | - | 1053 20 |
1053 20 | = | 5809 5000 | X |
5809 5000 | X | = | 1053 20 |
| X | = | 1053 20 | ÷ | 5809 5000 |
| = | 1053 20 | × | 5000 5809 |
| = | 1053 | × | 250 5809 |
| X | = | 263250 5809 |
| X | = | 45.317611 |