| 1500 | = | 10000 | × | 19 20 | − | 10000 | ÷ | x | × | 300 |
| Multiply both sides of the equation by: | x |
| 1500 | x | = | 10000 | × | 19 20 | x | − | 10000 | × | 300 |
| 1500 | x | − | 10000 | × | 19 20 | x | = | - | 10000 | × | 300 |
| 1500 | x | − | 9500 | x | = | - | 10000 | × | 300 |
| 1500 | x | − | 9500 | x | = | - | 3000000 |
| - | 8000 | x | = | - | 3000000 |
| 3000000 | = | 8000 | x |
| 8000 | x | = | 3000000 |
| x | = | 3000000 | ÷ | 8000 |
| = | 3000000 | × | 1 8000 |
| = | 375 | × | 1 |
| x | = | 375 |