| ( | 183 | − | x | ) | × | 87 10 | × | 5000 | × | 150 | = | ( | 21 | − | x | ) | × | 25000 | × | 150 |
| 方程左边 = | ( | 183 | − | x | ) | × | 6525000 |
| ( | 183 | − | x | ) | × | 6525000 | = | ( | 21 | − | x | ) | × | 25000 | × | 150 |
| 方程左边 = | 183 | × | 6525000 | − | x | × | 6525000 |
| = | 1194075000 | − | x | × | 6525000 |
| 1194075000 | − | 6525000 | x | = | ( | 21 | − | x | ) | × | 25000 | × | 150 |
| 方程右边 = | ( | 21 | − | x | ) | × | 3750000 |
| 1194075000 | − | 6525000 | x | = | ( | 21 | − | x | ) | × | 3750000 |
| 方程右边 = | 21 | × | 3750000 | − | x | × | 3750000 |
| = | 78750000 | − | x | × | 3750000 |
| 1194075000 | − | 6525000 | x | = | 78750000 | − | 3750000 | x |
| - | 6525000 | x | + | 3750000 | x | = | 78750000 | − | 1194075000 |
| - | 2775000 | x | = | 78750000 | − | 1194075000 |
| - | 2775000 | x | = | - | 1115325000 |
| 1115325000 | = | 2775000 | x |
| 2775000 | x | = | 1115325000 |
| x | = | 1115325000 | ÷ | 2775000 |
| = | 1115325000 | × | 1 2775000 |
| = | 14871 | × | 1 37 |
| x | = | 14871 37 |
| x | = | 401.918919 |