| ( | 209 | + | x | ) | ÷ | ( | 524 | + | x | ) | = | 1 2 |
| Multiply both sides of the equation by: | ( | 524 | + | x | ) |
| ( | 209 | + | x | ) | = | 1 2 | ( | 524 | + | x | ) |
| 209 | + | x | = | 1 2 | ( | 524 | + | x | ) |
| 209 | + | x | = | 1 2 | × | 524 | + | 1 2 | x |
| 209 | + | x | = | 262 | + | 1 2 | x |
| x | − | 1 2 | x | = | 262 | − | 209 |
1 2 | x | = | 262 | − | 209 |
1 2 | x | = | 53 |
| x | = | 53 | ÷ | 1 2 |
| = | 53 | × | 2 |
| x | = | 106 |