| ( | x | − | ( | x | ÷ | 2 | − | 600 | ) | ) | ÷ | 2 | + | 800 | + | 480 | = | x | − | ( | x | ÷ | 2 | − | 600 | ) |
| Left side of the equation = | ( | x | − | ( | x | ÷ | 2 | − | 600 | ) | ) | × | 1 2 | + | 1280 |
| ( | x | − | ( | x | ÷ | 2 | − | 600 | ) | ) | × | 1 2 | + | 1280 | = | x | − | ( | x | ÷ | 2 | − | 600 | ) |
| Left side of the equation = | x | × | 1 2 | − | ( | x | ÷ | 2 | − | 600 | ) | × | 1 2 | + | 1280 |
| = | 1 2 | x | − | x | ÷ | 2 | × | 1 2 | + | 600 | × | 1 2 | + | 1280 |
| = | 1 2 | x | − | x | × | 1 4 | + | 300 | + | 1280 |
| = | 1 4 | x | + | 1580 |
1 4 | x | + | 1580 | = | x | − | ( | x | ÷ | 2 | − | 600 | ) |
| Right side of the equation = | x | − | x | ÷ | 2 | + | 600 |
| = | 1 2 | x | + | 600 |
1 4 | x | + | 1580 | = | 1 2 | x | + | 600 |
1 4 | x | − | 1 2 | x | = | 600 | − | 1580 |
| - | 1 4 | x | = | 600 | − | 1580 |
| - | 1 4 | x | = | - | 980 |
| 980 | = | 1 4 | x |
1 4 | x | = | 980 |
| x | = | 980 | ÷ | 1 4 |
| = | 980 | × | 4 |
| x | = | 3920 |