| ( | 82899 | − | 5 2 | X | ) | × | 57 5 | ÷ | 112 5 | × | 9 10 | = | 19390 | + | 9 | X |
| 方程左边 = | ( | 82899 | − | 5 2 | X | ) | × | 513 1120 |
| ( | 82899 | − | 5 2 | X | ) | × | 513 1120 | = | 19390 | + | 9 | X |
| 方程左边 = | 82899 | × | 513 1120 | − | 5 2 | X | × | 513 1120 |
| = | 42527187 1120 | − | 513 448 | X |
42527187 1120 | − | 513 448 | X | = | 19390 | + | 9 | X |
| - | 513 448 | X | − | 9 | X | = | 19390 | − | 42527187 1120 |
| - | 4545 448 | X | = | 19390 | − | 42527187 1120 |
| - | 4545 448 | X | = | - | 20810387 1120 |
20810387 1120 | = | 4545 448 | X |
4545 448 | X | = | 20810387 1120 |
| X | = | 20810387 1120 | ÷ | 4545 448 |
| = | 20810387 1120 | × | 448 4545 |
| = | 20810387 5 | × | 2 4545 |
| X | = | 41620774 22725 |
| X | = | 1831.497206 |