| 5 | + | ( | 10 | ÷ | x | ) | = | 2 | ÷ | 3 | × | ( | 20 | ÷ | x | + | 5 | ) |
| 5 | + | 10 | ÷ | x | = | 2 | ÷ | 3 | × | ( | 20 | ÷ | x | + | 5 | ) |
| 5 | + | 10 | ÷ | x | = | 2 | ÷ | 3 | × | 20 | ÷ | x | + | 2 | ÷ | 3 | × | 5 |
| 5 | + | 10 | ÷ | x | = | 40 3 | ÷ | x | + | 10 3 |
| Multiply both sides of the equation by: | x |
| 5 | x | + | 10 | = | 40 3 | ÷ | 1 | × | 1 | + | 10 3 | x |
| 5 | x | − | 10 3 | x | = | 40 3 | ÷ | 1 | × | 1 | − | 10 |
| 5 | x | − | 10 3 | x | = | 40 3 | − | 10 |
5 3 | x | = | 40 3 | − | 10 |
5 3 | x | = | 10 3 |
| x | = | 10 3 | ÷ | 5 3 |
| = | 10 3 | × | 3 5 |
| = | 2 | × | 1 |
| x | = | 2 |