| ( | 55 | − | 55 | ) | ÷ | ( | 55 | − | 41 | ) | = | ( | 55 | − | X | ) | ÷ | ( | X | − | 41 | ) |
| Multiply both sides of the equation by: | ( | 55 | − | 41 | ) | , | ( | X | − | 41 | ) |
| ( | 55 | − | 55 | ) | ( | X | − | 41 | ) | = | ( | 55 | − | X | ) | ( | 55 | − | 41 | ) |
| 55 | ( | X | − | 41 | ) | − | 55 | ( | X | − | 41 | ) | = | ( | 55 | − | X | ) | ( | 55 | − | 41 | ) |
| 55 | ( | X | − | 41 | ) | − | 55 | ( | X | − | 41 | ) | = | 55 | ( | 55 | − | 41 | ) | − | X | ( | 55 | − | 41 | ) |
| 55 | X | − | 55 | × | 41 | − | 55 | ( | X | − | 41 | ) | = | 55 | ( | 55 | − | 41 | ) | − | X | ( | 55 | − | 41 | ) |
| 55 | X | − | 55 | × | 41 | − | 55 | ( | X | − | 41 | ) | = | 55 | × | 55 | − | 55 | × | 41 | − | X | ( | 55 | − | 41 | ) |
| 55 | X | − | 2255 | − | 55 | ( | X | − | 41 | ) | = | 3025 | − | 2255 | − | X | ( | 55 | − | 41 | ) |
| 55 | X | − | 2255 | − | 55 | ( | X | − | 41 | ) | = | 770 | − | X | ( | 55 | − | 41 | ) |
| 55 | X | − | 2255 | − | 55 | X | + | 55 | × | 41 | = | 770 | − | X | ( | 55 | − | 41 | ) |
| 55 | X | − | 2255 | − | 55 | X | + | 55 | × | 41 | = | 770 | − | X | × | 55 | + | X | × | 41 |
| 55 | X | − | 2255 | − | 55 | X | + | 2255 | = | 770 | − | X | × | 55 | + | X | × | 41 |
| 0 | X | − | 0 | = | 770 | − | 14 | X |
| 14 | X | = | 770 | + | 0 |
| 14 | X | = | 770 |
| X | = | 770 | ÷ | 14 |
| = | 770 | × | 1 14 |
| = | 55 | × | 1 |
| X | = | 55 |