| ( | 183 | − | x | ) | × | 87 10 | × | 5000 | = | ( | 21 | − | x | ) | × | 25000 |
| Left side of the equation = | ( | 183 | − | x | ) | × | 43500 |
| ( | 183 | − | x | ) | × | 43500 | = | ( | 21 | − | x | ) | × | 25000 |
| Left side of the equation = | 183 | × | 43500 | − | x | × | 43500 |
| = | 7960500 | − | x | × | 43500 |
| 7960500 | − | 43500 | x | = | ( | 21 | − | x | ) | × | 25000 |
| Right side of the equation = | 21 | × | 25000 | − | x | × | 25000 |
| = | 525000 | − | x | × | 25000 |
| 7960500 | − | 43500 | x | = | 525000 | − | 25000 | x |
| - | 43500 | x | + | 25000 | x | = | 525000 | − | 7960500 |
| - | 18500 | x | = | 525000 | − | 7960500 |
| - | 18500 | x | = | - | 7435500 |
| 7435500 | = | 18500 | x |
| 18500 | x | = | 7435500 |
| x | = | 7435500 | ÷ | 18500 |
| = | 7435500 | × | 1 18500 |
| = | 14871 | × | 1 37 |
| x | = | 14871 37 |
| x | = | 401.918919 |