| 22 | × | 29 | − | ( | 22 | − | 2 | x | ) | ( | 29 | − | 2 | x | ) | = | 1 | ÷ | 4 | × | 22 | × | 29 |
| Left side of the equation = | 638 | − | ( | 22 | − | 2 | x | ) | ( | 29 | − | 2 | x | ) |
| 638 | − | ( | 22 | − | 2 | x | ) | ( | 29 | − | 2 | x | ) | = | 1 | ÷ | 4 | × | 22 | × | 29 |
| Left side of the equation = | 638 | − | 22 | ( | 29 | − | 2 | x | ) | + | 2 | x | ( | 29 | − | 2 | x | ) |
| = | 638 | − | 22 | × | 29 | + | 22 | × | 2 | x | + | 2 | x | ( | 29 | − | 2 | x | ) |
| = | 638 | − | 638 | + | 44 | x | + | 2 | x | ( | 29 | − | 2 | x | ) |
| = | 0 | + | 44 | x | + | 2 | x | ( | 29 | − | 2 | x | ) |
| = | 0 | + | 44 | x | + | 2 | x | × | 29 | − | 2 | x | × | 2 | x |
| = | 0 | + | 44 | x | + | 58 | x | − | 4 | x | x |
| = | 0 | + | 102 | x | − | 4 | x | x |
| 0 | + | 102 | x | − | 4 | x | x | = | 1 | ÷ | 4 | × | 22 | × | 29 |
| Right side of the equation = | 319 2 |
| 0 | + | 102 | x | − | 4 | x | x | = | 319 2 |