| x | × | 6 5 | × | 9 10 | + | ( | 3600 | − | x | ) | × | 3 20 | × | 9 10 | − | 3600 | = | 198 |
| 方程左边 = | x | × | 27 25 | + | ( | 3600 | − | x | ) | × | 27 200 | − | 3600 |
27 25 | x | + | ( | 3600 | − | x | ) | × | 27 200 | − | 3600 | = | 198 |
| 方程左边 = | 27 25 | x | + | 3600 | × | 27 200 | − | x | × | 27 200 | − | 3600 |
| = | 27 25 | x | + | 486 | − | x | × | 27 200 | − | 3600 |
| = | 189 200 | x | − | 3114 |
189 200 | x | − | 3114 | = | 198 |
189 200 | x | = | 198 | + | 3114 |
189 200 | x | = | 3312 |
| x | = | 3312 | ÷ | 189 200 |
| = | 3312 | × | 200 189 |
| = | 368 | × | 200 21 |
| x | = | 73600 21 |
| x | = | 3504.761905 |