85 100 | ( | 140 100 | x | + | 130 100 | ( | 200 | − | x | ) | ) | − | 200 | = | 573 20 | × | 2 |
| 方程左边 = | 85 100 | × | 140 100 | x | + | 85 100 | × | 130 100 | ( | 200 | − | x | ) | − | 200 |
| = | 119 100 | x | + | 221 200 | ( | 200 | − | x | ) | − | 200 |
| = | 119 100 | x | + | 221 200 | × | 200 | − | 221 200 | x | − | 200 |
| = | 119 100 | x | + | 221 | − | 221 200 | x | − | 200 |
| = | 17 200 | x | + | 21 |
17 200 | x | + | 21 | = | 573 20 | × | 2 |
| 方程右边 = | 573 10 |
17 200 | x | + | 21 | = | 573 10 |
17 200 | x | = | 573 10 | − | 21 |
17 200 | x | = | 363 10 |
| x | = | 363 10 | ÷ | 17 200 |
| = | 363 10 | × | 200 17 |
| = | 363 | × | 20 17 |
| x | = | 7260 17 |
| x | = | 427.058824 |