| ( | 480 | × | 76 | − | x | ) | × | 17 20 | + | 18 | × | 76 | = | 724527 25 |
| 方程左边 = | ( | 480 | × | 76 | − | x | ) | × | 17 20 | + | 1368 |
| ( | 480 | × | 76 | − | x | ) | × | 17 20 | + | 1368 | = | 724527 25 |
| 方程左边 = | 480 | × | 76 | × | 17 20 | − | x | × | 17 20 | + | 1368 |
| = | 31008 | − | x | × | 17 20 | + | 1368 |
| = | 32376 | − | 17 20 | x |
| 32376 | − | 17 20 | x | = | 724527 25 |
| - | 17 20 | x | = | 724527 25 | − | 32376 |
| - | 17 20 | x | = | - | 84873 25 |
84873 25 | = | 17 20 | x |
17 20 | x | = | 84873 25 |
| x | = | 84873 25 | ÷ | 17 20 |
| = | 84873 25 | × | 20 17 |
| = | 84873 5 | × | 4 17 |
| x | = | 339492 85 |
| x | = | 3994.023529 |