| ( | 200 | + | x | ) | ( | ( | - | x | ÷ | 10 | ) | + | 50 | ) | = | 10560 |
| Left side of the equation = | 200 | ( | ( | - | x | ÷ | 10 | ) | + | 50 | ) | + | x | ( | ( | - | x | ÷ | 10 | ) | + | 50 | ) |
| = | 200 | ( | - | x | ÷ | 10 | ) | + | 200 | × | 50 | + | x | ( | ( | - | x | ÷ | 10 | ) | + | 50 | ) |
| = | 200 | ( | - | x | ÷ | 10 | ) | + | 10000 | + | x | ( | ( | - | x | ÷ | 10 | ) | + | 50 | ) |
| = | - | 200 | x | ÷ | 10 | + | 10000 | + | x | ( | ( | - | x | ÷ | 10 | ) | + | 50 | ) |
| = | - | 20 | x | + | 10000 | + | x | ( | ( | - | x | ÷ | 10 | ) | + | 50 | ) |
| = | - | 20 | x | + | 10000 | + | x | ( | - | x | ÷ | 10 | ) | + | x | × | 50 |
| = | 30 | x | + | 10000 | + | x | ( | - | x | ÷ | 10 | ) |
| = | 30 | x | + | 10000 | − | x | x | ÷ | 10 |
| 30 | x | + | 10000 | − | x | x | × | 1 10 | = | 10560 |