| ( | 8300 | + | 60 | + | X | ) | × | 16 500 | = | 4 | X |
| 方程左边 = | 8300 | × | 16 500 | + | 60 | × | 16 500 | + | X | × | 16 500 |
| = | 1328 5 | + | 48 25 | + | X | × | 16 500 |
| = | 6688 25 | + | 16 500 | X |
6688 25 | + | 16 500 | X | = | 4 | X |
16 500 | X | − | 4 | X | = | - | 6688 25 |
| - | 496 125 | X | = | - | 6688 25 |
6688 25 | = | 496 125 | X |
496 125 | X | = | 6688 25 |
| X | = | 6688 25 | ÷ | 496 125 |
| = | 6688 25 | × | 125 496 |
| = | 418 | × | 5 31 |
| X | = | 2090 31 |
| X | = | 67.419355 |