| ( | 5000 | × | 12 | × | 9 10 | − | 70 100 | × | 186 | X | × | 9 200 | ) | ÷ | ( | 30 100 | × | 186 | X | + | 5 100 | × | 186 | X | ) | = | 19 500 |
| 方程两边同时乘以: | ( | 30 100 | × | 186 | X | + | 5 100 | × | 186 | X | ) |
| ( | 5000 | × | 12 | × | 9 10 | − | 70 100 | × | 186 | X | × | 9 200 | ) | = | 19 500 | ( | 30 100 | × | 186 | X | + | 5 100 | × | 186 | X | ) |
| 5000 | × | 12 | × | 9 10 | − | 70 100 | × | 186 | X | × | 9 200 | = | 19 500 | ( | 30 100 | × | 186 | X | + | 5 100 | × | 186 | X | ) |
| 5000 | × | 12 | × | 9 10 | − | 70 100 | × | 186 | X | × | 9 200 | = | 19 500 | × | 30 100 | × | 186 | X | + | 19 500 | × | 5 100 | × | 186 | X |
| 54000 | − | 5859 1000 | X | = | 5301 2500 | X | + | 1767 5000 | X |
| 54000 | − | 5859 1000 | X | = | 12369 5000 | X |
| - | 5859 1000 | X | − | 12369 5000 | X | = | - | 54000 |
| - | 5208 625 | X | = | - | 54000 |
| 54000 | = | 5208 625 | X |
5208 625 | X | = | 54000 |
| X | = | 54000 | ÷ | 5208 625 |
| = | 54000 | × | 625 5208 |
| = | 2250 | × | 625 217 |
| X | = | 1406250 217 |
| X | = | 6480.414747 |