| ( | 1 | ÷ | 9 | + | 1 | ÷ | 18 | ) | × | 2 | + | ( | 1 | ÷ | 18 | ) | x | = | 1 |
| Left side of the equation = | 1 | ÷ | 9 | × | 2 | + | 1 | ÷ | 18 | × | 2 | + | ( | 1 | ÷ | 18 | ) | x |
| = | 2 9 | + | 1 9 | + | ( | 1 | ÷ | 18 | ) | x |
| = | 1 3 | + | ( | 1 | ÷ | 18 | ) | x |
| = | 1 3 | + | 1 | ÷ | 18 | × | x |
| = | 1 3 | + | 1 18 | x |
1 3 | + | 1 18 | x | = | 1 |
1 18 | x | = | 1 | − | 1 3 |
1 18 | x | = | 2 3 |
| x | = | 2 3 | ÷ | 1 18 |
| = | 2 3 | × | 18 |
| = | 2 | × | 6 |
| x | = | 12 |