| X | ÷ | 87 | − | ( | 100 | − | X | ) | ÷ | 100 | = | 73 100 |
| Left side of the equation = | 1 87 | X | − | 100 | × | 1 100 | + | X | × | 1 100 |
| = | 1 87 | X | − | 1 | + | X | × | 1 100 |
| = | 187 8700 | X | − | 1 |
187 8700 | X | − | 1 | = | 73 100 |
187 8700 | X | = | 73 100 | + | 1 |
187 8700 | X | = | 173 100 |
| X | = | 173 100 | ÷ | 187 8700 |
| = | 173 100 | × | 8700 187 |
| = | 173 | × | 87 187 |
| X | = | 15051 187 |
| X | = | 80.486631 |