| 1560 | × | 9 25 | + | ( | 3600 | − | 1561 | ) | × | 9 20 | + | ( | x | − | 3601 | ) | × | 49 100 | = | 449 1000 | x |
| 方程左边 = | 2808 5 | + | ( | 3600 | − | 1561 | ) | × | 9 20 | + | ( | x | − | 3601 | ) | × | 49 100 |
2808 5 | + | ( | 3600 | − | 1561 | ) | × | 9 20 | + | ( | x | − | 3601 | ) | × | 49 100 | = | 449 1000 | x |
| 方程左边 = | 2808 5 | + | 3600 | × | 9 20 | − | 1561 | × | 9 20 | + | ( | x | − | 3601 | ) | × | 49 100 |
| = | 2808 5 | + | 1620 | − | 14049 20 | + | ( | x | − | 3601 | ) | × | 49 100 |
| = | 29583 20 | + | ( | x | − | 3601 | ) | × | 49 100 |
| = | 29583 20 | + | x | × | 49 100 | − | 3601 | × | 49 100 |
| = | 29583 20 | + | x | × | 49 100 | − | 176449 100 |
| = | - | 14267 50 | + | 49 100 | x |
| - | 14267 50 | + | 49 100 | x | = | 449 1000 | x |
49 100 | x | − | 449 1000 | x | = | 14267 50 |
41 1000 | x | = | 14267 50 |
| x | = | 14267 50 | ÷ | 41 1000 |
| = | 14267 50 | × | 1000 41 |
| = | 14267 | × | 20 41 |
| x | = | 285340 41 |
| x | = | 6959.512195 |