| ( | 50 | − | 50 | × | 5 100 | ) | X | = | 10 | + | 50 | × | 11 20 | X |
| Left side of the equation = | 50 | X | − | 50 | × | 5 100 | X |
| = | 50 | X | − | 5 2 | X |
| = | 95 2 | X |
95 2 | X | = | 10 | + | 50 | × | 11 20 | X |
| Right side of the equation = | 10 | + | 55 2 | X |
95 2 | X | = | 10 | + | 55 2 | X |
95 2 | X | − | 55 2 | X | = | 10 |
| 20 | X | = | 10 |
| X | = | 10 | ÷ | 20 |
| = | 10 | × | 1 20 |
| = | 1 | × | 1 2 |
| X | = | 1 2 |
| X | = | 0.5 |