| ( | x | − | 20 | ) | ( | 60 | − | 1 | ÷ | 10 | × | x | ) | = | 10080 |
| Left side of the equation = | x | ( | 60 | − | 1 | ÷ | 10 | × | x | ) | − | 20 | ( | 60 | − | 1 | ÷ | 10 | × | x | ) |
| = | x | × | 60 | − | x | × | 1 | ÷ | 10 | × | x | − | 20 | ( | 60 | − | 1 | ÷ | 10 | × | x | ) |
| = | x | × | 60 | − | x | × | 1 10 | x | − | 20 | ( | 60 | − | 1 | ÷ | 10 | × | x | ) |
| = | 60 | x | − | x | × | 1 10 | x | − | 20 | × | 60 | + | 20 | × | 1 | ÷ | 10 | × | x |
| = | 60 | x | − | x | × | 1 10 | x | − | 1200 | + | 2 | x |
| = | 62 | x | − | x | × | 1 10 | x | − | 1200 |
| 62 | x | − | x | × | 1 10 | x | − | 1200 | = | 10080 |