| 1600 | ( | 1 | + | 1 2 | ) | − | 1600 | = | 2 | ( | 1 | + | 1 2 | ) | x |
| Left side of the equation = | 1600 | × | 1 | + | 1600 | × | 1 2 | − | 1600 |
| = | 1600 | + | 800 | − | 1600 |
| = | 800 |
| 800 | = | 2 | ( | 1 | + | 1 2 | ) | x |
| Right side of the equation = | 2 | × | 1 | x | + | 2 | × | 1 2 | x |
| = | 2 | x | + | 1 | x |
| = | 3 | x |
| 800 | = | 3 | x |
| - | 3 | x | = | - | 800 |
| 800 | = | 3 | x |
| 3 | x | = | 800 |
| x | = | 800 | ÷ | 3 |
| = | 800 | × | 1 3 |
| x | = | 800 3 |
| x | = | 266.666667 |