| ( | ( | 3600 | − | x | ) | × | 23 20 | + | x | × | 6 5 | ) | × | 9 10 | = | 3600 | + | 198 |
| 方程左边 = | ( | 3600 | − | x | ) | × | 23 20 | × | 9 10 | + | x | × | 6 5 | × | 9 10 |
| = | ( | 3600 | − | x | ) | × | 207 200 | + | x | × | 27 25 |
| = | 3600 | × | 207 200 | − | x | × | 207 200 | + | 27 25 | x |
| = | 3726 | − | x | × | 207 200 | + | 27 25 | x |
| = | 3726 | + | 9 200 | x |
| 3726 | + | 9 200 | x | = | 3600 | + | 198 |
| 方程右边 = | 3798 |
| 3726 | + | 9 200 | x | = | 3798 |
9 200 | x | = | 3798 | − | 3726 |
9 200 | x | = | 72 |
| x | = | 72 | ÷ | 9 200 |
| = | 72 | × | 200 9 |
| = | 8 | × | 200 |
| x | = | 1600 |