| 183 | − | x | × | 87 10 | × | 5000 | = | 21 | − | x | × | 25000 |
| Left side of the equation = | 183 | − | x | × | 43500 |
| 183 | − | 43500 | x | = | 21 | − | x | × | 25000 |
| - | 43500 | x | + | 25000 | x | = | 21 | − | 183 |
| - | 18500 | x | = | 21 | − | 183 |
| - | 18500 | x | = | - | 162 |
| 162 | = | 18500 | x |
| 18500 | x | = | 162 |
| x | = | 162 | ÷ | 18500 |
| = | 162 | × | 1 18500 |
| = | 81 | × | 1 9250 |
| x | = | 81 9250 |
| x | = | 0.008757 |