| 12 | ÷ | x | + | 12 | ÷ | x | − | 1500 | = | 102000 |
| Multiply both sides of the equation by: | x |
| 12 | + | 12 | ÷ | 1 | × | 1 | − | 1500 | x | = | 102000 | x |
| - | 1500 | x | − | 102000 | x | = | - | 12 | − | 12 | ÷ | 1 | × | 1 |
| - | 1500 | x | − | 102000 | x | = | - | 12 | − | 12 |
| - | 103500 | x | = | - | 12 | − | 12 |
| - | 103500 | x | = | - | 24 |
| 24 | = | 103500 | x |
| 103500 | x | = | 24 |
| x | = | 24 | ÷ | 103500 |
| = | 24 | × | 1 103500 |
| = | 2 | × | 1 8625 |
| x | = | 2 8625 |
| x | = | 0.000232 |