10 100 | = | ( | X | − | 128 | ) | ÷ | 128 |
| Right side of the equation = | X | × | 1 128 | − | 128 | × | 1 128 |
| = | X | × | 1 128 | − | 1 |
10 100 | = | 1 128 | X | − | 1 |
| - | 1 128 | X | = | - | 1 | − | 10 100 |
| - | 1 128 | X | = | - | 11 10 |
11 10 | = | 1 128 | X |
1 128 | X | = | 11 10 |
| X | = | 11 10 | ÷ | 1 128 |
| = | 11 10 | × | 128 |
| = | 11 5 | × | 64 |
| X | = | 704 5 |
| X | = | 140.8 |