| ( | 5 | + | 50 | X | ) | ÷ | 11 | = | ( | 6 | + | 84 | X | ) | ÷ | 12 |
| Left side of the equation = | 5 | × | 1 11 | + | 50 | X | × | 1 11 |
| = | 5 11 | + | 50 11 | X |
5 11 | + | 50 11 | X | = | ( | 6 | + | 84 | X | ) | ÷ | 12 |
| Right side of the equation = | 6 | × | 1 12 | + | 84 | X | × | 1 12 |
| = | 1 2 | + | 7 | X |
5 11 | + | 50 11 | X | = | 1 2 | + | 7 | X |
50 11 | X | − | 7 | X | = | 1 2 | − | 5 11 |
| - | 27 11 | X | = | 1 2 | − | 5 11 |
| - | 27 11 | X | = | 1 22 |
| - | 1 22 | = | 27 11 | X |
27 11 | X | = | - | 1 22 |
| X | = | - | 1 22 | ÷ | 27 11 |
| = | - | 1 22 | × | 11 27 |
| = | - | 1 2 | × | 1 27 |
| X | = | - | 1 54 |
| X | = | - 0.018519 |