| ( | 1 100 | − | 1 100 | ) | ( | 1 100 | − | B | ) | = | B |
| Left side of the equation = | 1 100 | ( | 1 100 | − | B | ) | − | 1 100 | ( | 1 100 | − | B | ) |
| = | 1 100 | × | 1 100 | − | 1 100 | B | − | 1 100 | ( | 1 100 | − | B | ) |
| = | 1 10000 | − | 1 100 | B | − | 1 100 | ( | 1 100 | − | B | ) |
| = | 1 10000 | − | 1 100 | B | − | 1 100 | × | 1 100 | + | 1 100 | B |
| = | 1 10000 | − | 1 100 | B | − | 1 10000 | + | 1 100 | B |
| = | 0 | − | 0 | B |
| 0 | − | 0 | B | = | B |
| - | B | = | 0 |
| - | 0 | = | B |
| B | = | - | 0 |