| ( | 5000 | × | 12 | × | 9 10 | − | 7 10 | × | 130 | x | × | 8 125 | ) | ÷ | 2 | = | 19 500 |
| 方程左边 = | 5000 | × | 12 | × | 9 10 | × | 1 2 | − | 7 10 | × | 130 | x | × | 8 125 | × | 1 2 |
| = | 27000 | − | 364 125 | x |
| 27000 | − | 364 125 | x | = | 19 500 |
| - | 364 125 | x | = | 19 500 | − | 27000 |
| - | 364 125 | x | = | - | 13499981 500 |
13499981 500 | = | 364 125 | x |
364 125 | x | = | 13499981 500 |
| x | = | 13499981 500 | ÷ | 364 125 |
| = | 13499981 500 | × | 125 364 |
| = | 13499981 4 | × | 1 364 |
| x | = | 13499981 1456 |
| x | = | 9271.964973 |