| ( | 2730 | − | X | ) | ÷ | X | = | 2143 5000 |
| 方程两边同时乘以: | X |
| ( | 2730 | − | X | ) | = | 2143 5000 | X |
| 2730 | − | X | = | 2143 5000 | X |
| - | X | − | 2143 5000 | X | = | - | 2730 |
| - | 7143 5000 | X | = | - | 2730 |
| 2730 | = | 7143 5000 | X |
7143 5000 | X | = | 2730 |
| X | = | 2730 | ÷ | 7143 5000 |
| = | 2730 | × | 5000 7143 |
| = | 910 | × | 5000 2381 |
| X | = | 4550000 2381 |
| X | = | 1910.961781 |