| ( | 5000 | × | 12 | × | 9 10 | − | 7 10 | × | 130 | x | × | 8 125 | ) | = | 19 500 |
| 方程左边 = | 5000 | × | 12 | × | 9 10 | − | 7 10 | × | 130 | x | × | 8 125 |
| = | 54000 | − | 728 125 | x |
| 54000 | − | 728 125 | x | = | 19 500 |
| - | 728 125 | x | = | 19 500 | − | 54000 |
| - | 728 125 | x | = | - | 26999981 500 |
26999981 500 | = | 728 125 | x |
728 125 | x | = | 26999981 500 |
| x | = | 26999981 500 | ÷ | 728 125 |
| = | 26999981 500 | × | 125 728 |
| = | 26999981 4 | × | 1 728 |
| x | = | 26999981 2912 |
| x | = | 9271.971497 |