| 5 | ÷ | 4 | × | ( | 800 | − | 2 | x | ) | ( | 600 | − | 10 | x | ) | = | 480000 |
| Left side of the equation = | 5 4 | ( | 800 | − | 2 | x | ) | ( | 600 | − | 10 | x | ) |
5 4 | ( | 800 | − | 2 | x | ) | ( | 600 | − | 10 | x | ) | = | 480000 |
| Left side of the equation = | 5 4 | × | 800 | ( | 600 | − | 10 | x | ) | − | 5 4 | × | 2 | x | ( | 600 | − | 10 | x | ) |
| = | 1000 | ( | 600 | − | 10 | x | ) | − | 5 2 | x | ( | 600 | − | 10 | x | ) |
| = | 1000 | × | 600 | − | 1000 | × | 10 | x | − | 5 2 | x | ( | 600 | − | 10 | x | ) |
| = | 600000 | − | 10000 | x | − | 5 2 | x | ( | 600 | − | 10 | x | ) |
| = | 600000 | − | 10000 | x | − | 5 2 | x | × | 600 | + | 5 2 | x | × | 10 | x |
| = | 600000 | − | 10000 | x | − | 1500 | x | + | 25 | x | x |
| = | 600000 | − | 11500 | x | + | 25 | x | x |
| 600000 | − | 11500 | x | + | 25 | x | x | = | 480000 |