| ( | ( | X | + | 3900 | ) | ÷ | 3900 | ) | × | 397 1000 | = | 14 |
| 方程左边 = | ( | X | + | 3900 | ) | ÷ | 3900 | × | 397 1000 |
| = | ( | X | + | 3900 | ) | × | 397 3900000 |
| = | X | × | 397 3900000 | + | 3900 | × | 397 3900000 |
| = | X | × | 397 3900000 | + | 397 1000 |
397 3900000 | X | + | 397 1000 | = | 14 |
397 3900000 | X | = | 14 | − | 397 1000 |
397 3900000 | X | = | 13603 1000 |
| X | = | 13603 1000 | ÷ | 397 3900000 |
| = | 13603 1000 | × | 3900000 397 |
| = | 13603 | × | 3900 397 |
| X | = | 53051700 397 |
| X | = | 133631.486146 |