| 800 | ÷ | x | = | 500 | ÷ | x | + | 5 | × | 2 |
| Multiply both sides of the equation by: | x |
| 800 | = | 500 | ÷ | 1 | × | 1 | + | 5 | × | 2 | x |
| - | 5 | × | 2 | x | = | 500 | ÷ | 1 | × | 1 | − | 800 |
| - | 10 | x | = | 500 | ÷ | 1 | × | 1 | − | 800 |
| - | 10 | x | = | 500 | − | 800 |
| - | 10 | x | = | - | 300 |
| 300 | = | 10 | x |
| 10 | x | = | 300 |
| x | = | 300 | ÷ | 10 |
| = | 300 | × | 1 10 |
| = | 30 | × | 1 |
| x | = | 30 |