69 5 | × | 1800 | x | ( | 1500 | − | x | ÷ | 2 | ) | = | 3996600000 |
| Left side of the equation = | 24840 | x | ( | 1500 | − | x | ÷ | 2 | ) |
| 24840 | x | ( | 1500 | − | x | ÷ | 2 | ) | = | 3996600000 |
| Left side of the equation = | 24840 | x | × | 1500 | − | 24840 | x | x | ÷ | 2 |
| = | 37260000 | x | − | 12420 | x | x |
| 37260000 | x | − | 12420 | x | x | = | 3996600000 |