| 25000 | ÷ | ( | 2500 | + | A | ) | ÷ | 2 | = | 8 |
| Multiply both sides of the equation by: | ( | 2500 | + | A | ) |
| 25000 | ÷ | 2 | = | 8 | ( | 2500 | + | A | ) |
| 25000 | ÷ | 2 | = | 8 | × | 2500 | + | 8 | A |
| 12500 | = | 20000 | + | 8 | A |
| - | 8 | A | = | 20000 | − | 12500 |
| - | 8 | A | = | 7500 |
| - | 7500 | = | 8 | A |
| 8 | A | = | - | 7500 |
| A | = | - | 7500 | ÷ | 8 |
| = | - | 7500 | × | 1 8 |
| = | - | 1875 | × | 1 2 |
| A | = | - | 1875 2 |
| A | = | - 937.5 |