| ( | x | − | 500 | ) | ( | 1 | − | 25 100 | ) | − | 55 | ÷ | 100 | = | ( | x | − | 200 | ) | − | ( | 1 | × | 25 100 | ) | − | 55 | ÷ | 200 |
| Left side of the equation = | ( | x | − | 500 | ) | ( | 1 | − | 25 100 | ) | − | 11 20 |
| ( | x | − | 500 | ) | ( | 1 | − | 25 100 | ) | − | 11 20 | = | ( | x | − | 200 | ) | − | ( | 1 | × | 25 100 | ) | − | 55 | ÷ | 200 |
| Left side of the equation = | x | ( | 1 | − | 25 100 | ) | − | 500 | ( | 1 | − | 25 100 | ) | − | 11 20 |
| = | x | × | 1 | − | x | × | 25 100 | − | 500 | ( | 1 | − | 25 100 | ) | − | 11 20 |
| = | 3 4 | x | − | 500 | ( | 1 | − | 25 100 | ) | − | 11 20 |
| = | 3 4 | x | − | 500 | × | 1 | + | 500 | × | 25 100 | − | 11 20 |
| = | 3 4 | x | − | 500 | + | 125 | − | 11 20 |
| = | 3 4 | x | − | 7511 20 |
3 4 | x | − | 7511 20 | = | ( | x | − | 200 | ) | − | ( | 1 | × | 25 100 | ) | − | 55 | ÷ | 200 |
| Right side of the equation = | ( | x | − | 200 | ) | − | ( | 1 | × | 25 100 | ) | − | 11 40 |
3 4 | x | − | 7511 20 | = | ( | x | − | 200 | ) | − | ( | 1 | × | 25 100 | ) | − | 11 40 |
| Right side of the equation = | x | − | 200 | − | ( | 1 | × | 25 100 | ) | − | 11 40 |
| = | x | − | 8011 40 | − | ( | 1 | × | 25 100 | ) |
| = | x | − | 8011 40 | − | 1 | × | 25 100 |
| = | x | − | 8011 40 | − | 1 4 |
| = | x | − | 8021 40 |
3 4 | x | − | 7511 20 | = | x | − | 8021 40 |
3 4 | x | − | x | = | - | 8021 40 | + | 7511 20 |
| - | 1 4 | x | = | - | 8021 40 | + | 7511 20 |
| - | 1 4 | x | = | 7001 40 |
| - | 7001 40 | = | 1 4 | x |
1 4 | x | = | - | 7001 40 |
| x | = | - | 7001 40 | ÷ | 1 4 |
| = | - | 7001 40 | × | 4 |
| = | - | 7001 10 | × | 1 |
| x | = | - | 7001 10 |
| x | = | - 700.1 |