| ( | 10 | + | X | ) | × | 101 100 | − | 8 | = | 69 50 |
| Left side of the equation = | 10 | × | 101 100 | + | X | × | 101 100 | − | 8 |
| = | 101 10 | + | X | × | 101 100 | − | 8 |
| = | 21 10 | + | 101 100 | X |
21 10 | + | 101 100 | X | = | 69 50 |
101 100 | X | = | 69 50 | − | 21 10 |
101 100 | X | = | - | 18 25 |
| X | = | - | 18 25 | ÷ | 101 100 |
| = | - | 18 25 | × | 100 101 |
| = | - | 18 | × | 4 101 |
| X | = | - | 72 101 |
| X | = | - 0.712871 |