| X | − | ( | 1 | ÷ | 2 | × | X | − | 600 | ) | = | ( | 1 | ÷ | 2 | × | X | − | 600 | ÷ | 2 | + | 800 | + | 480 | ) |
| Left side of the equation = | X | − | 1 | ÷ | 2 | × | X | + | 600 |
| = | X | − | 1 2 | X | + | 600 |
| = | 1 2 | X | + | 600 |
1 2 | X | + | 600 | = | ( | 1 | ÷ | 2 | × | X | − | 600 | ÷ | 2 | + | 800 | + | 480 | ) |
| Right side of the equation = | 1 | ÷ | 2 | × | X | − | 600 | ÷ | 2 | + | 800 | + | 480 |
| = | 1 2 | X | − | 300 | + | 800 | + | 480 |
| = | 1 2 | X | + | 980 |
1 2 | X | + | 600 | = | 1 2 | X | + | 980 |
1 2 | X | − | 1 2 | X | = | 980 | − | 600 |
| 0 | X | = | 980 | − | 600 |
| 0 | X | = | 380 |