| 18 | + | 91 10 | + | 269 5 | + | 62 5 | X | = | 47 2 | X |
| Left side of the equation = | 809 10 | + | 62 5 | X |
809 10 | + | 62 5 | X | = | 47 2 | X |
62 5 | X | − | 47 2 | X | = | - | 809 10 |
| - | 111 10 | X | = | - | 809 10 |
809 10 | = | 111 10 | X |
111 10 | X | = | 809 10 |
| X | = | 809 10 | ÷ | 111 10 |
| = | 809 10 | × | 10 111 |
| = | 809 | × | 1 111 |
| X | = | 809 111 |
| X | = | 7.288288 |