| 50 | − | ( | 100 | + | x | ) | × | 1 100 | + | x | = | 10 |
| Left side of the equation = | 50 | − | 100 | × | 1 100 | − | x | × | 1 100 | + | x |
| = | 50 | − | 1 | − | x | × | 1 100 | + | x |
| = | 49 | + | 99 100 | x |
| 49 | + | 99 100 | x | = | 10 |
99 100 | x | = | 10 | − | 49 |
99 100 | x | = | - | 39 |
| x | = | - | 39 | ÷ | 99 100 |
| = | - | 39 | × | 100 99 |
| = | - | 13 | × | 100 33 |
| x | = | - | 1300 33 |
| x | = | - 39.393939 |