27 500 | x | + | 207 2500 | ( | 200000 | − | x | ) | = | 153 125 |
| 方程左边 = | 27 500 | x | + | 207 2500 | × | 200000 | − | 207 2500 | x |
| = | 27 500 | x | + | 16560 | − | 207 2500 | x |
| = | - | 18 625 | x | + | 16560 |
| - | 18 625 | x | + | 16560 | = | 153 125 |
| - | 18 625 | x | = | 153 125 | − | 16560 |
| - | 18 625 | x | = | - | 2069847 125 |
2069847 125 | = | 18 625 | x |
18 625 | x | = | 2069847 125 |
| x | = | 2069847 125 | ÷ | 18 625 |
| = | 2069847 125 | × | 625 18 |
| = | 229983 | × | 5 2 |
| x | = | 1149915 2 |
| x | = | 574957.5 |