| 1 | ÷ | 3 | × | X | + | 1 | ÷ | 9 | × | ( | 5 | − | X | ) | = | 1 |
| Left side of the equation = | 1 3 | X | + | 1 9 | ( | 5 | − | X | ) |
1 3 | X | + | 1 9 | ( | 5 | − | X | ) | = | 1 |
| Left side of the equation = | 1 3 | X | + | 1 9 | × | 5 | − | 1 9 | X |
| = | 1 3 | X | + | 5 9 | − | 1 9 | X |
| = | 2 9 | X | + | 5 9 |
2 9 | X | + | 5 9 | = | 1 |
2 9 | X | = | 1 | − | 5 9 |
2 9 | X | = | 4 9 |
| X | = | 4 9 | ÷ | 2 9 |
| = | 4 9 | × | 9 2 |
| = | 2 | × | 1 |
| X | = | 2 |