| 30000 | + | 1 1000 | X | + | 16500 | + | 9 5000 | X | + | 16500 | + | 1 1000 | X | + | 5500 | + | 1 5000 | X | = | 1 80 | X |
| 方程左边 = | 68500 | + | 1 250 | X |
| 68500 | + | 1 250 | X | = | 1 80 | X |
1 250 | X | − | 1 80 | X | = | - | 68500 |
| - | 17 2000 | X | = | - | 68500 |
| 68500 | = | 17 2000 | X |
17 2000 | X | = | 68500 |
| X | = | 68500 | ÷ | 17 2000 |
| = | 68500 | × | 2000 17 |
| X | = | 137000000 17 |
| X | = | 8058823.529412 |