| x | ÷ | ( | x | + | 81 5 | ) | = | 3 | ÷ | 5 |
| Multiply both sides of the equation by: | ( | x | + | 81 5 | ) |
| x | = | 3 | ÷ | 5 | × | ( | x | + | 81 5 | ) |
| x | = | 3 | ÷ | 5 | × | x | + | 3 | ÷ | 5 | × | 81 5 |
| x | = | 3 5 | x | + | 243 25 |
| x | − | 3 5 | x | = | 243 25 |
2 5 | x | = | 243 25 |
| x | = | 243 25 | ÷ | 2 5 |
| = | 243 25 | × | 5 2 |
| = | 243 5 | × | 1 2 |
| x | = | 243 10 |
| x | = | 24.3 |