| 7 | ÷ | 18 | × | X | − | 39 | ÷ | 11 | ÷ | 18 | × | X | − | 39 | = | 7 | ÷ | 5 |
| Left side of the equation = | 7 18 | X | − | 13 66 | X | − | 39 |
| = | 19 99 | X | − | 39 |
19 99 | X | − | 39 | = | 7 | ÷ | 5 |
| Right side of the equation = | 7 5 |
19 99 | X | − | 39 | = | 7 5 |
19 99 | X | = | 7 5 | + | 39 |
19 99 | X | = | 202 5 |
| X | = | 202 5 | ÷ | 19 99 |
| = | 202 5 | × | 99 19 |
| X | = | 19998 95 |
| X | = | 210.505263 |