| ( | 1520 | − | X | ÷ | 2 | + | 160 | ) | ÷ | 2 | = | 1520 | − | X |
| Left side of the equation = | 1520 | × | 1 2 | − | X | ÷ | 2 | × | 1 2 | + | 160 | × | 1 2 |
| = | 760 | − | X | × | 1 4 | + | 80 |
| = | 840 | − | 1 4 | X |
| 840 | − | 1 4 | X | = | 1520 | − | X |
| - | 1 4 | X | + | X | = | 1520 | − | 840 |
| - | - | 3 4 | X | = | 1520 | − | 840 |
| - | - | 3 4 | X | = | 680 |
| - | 680 | = | - | 3 4 | X |
| - | 3 4 | X | = | - | 680 |
| X | = | 680 | ÷ | 3 4 |
| = | 680 | × | 4 3 |
| X | = | 2720 3 |
| X | = | 906.666667 |