| ( | 2 | − | ( | 330821 5000 | − | X | ) | ) | ÷ | 2 | = | 17 5 |
| Left side of the equation = | 2 | × | 1 2 | − | ( | 330821 5000 | − | X | ) | × | 1 2 |
| = | 1 | − | ( | 330821 5000 | − | X | ) | × | 1 2 |
| = | 1 | − | 330821 5000 | × | 1 2 | + | X | × | 1 2 |
| = | 1 | − | 330821 10000 | + | X | × | 1 2 |
| = | - | 320821 10000 | + | 1 2 | X |
| - | 320821 10000 | + | 1 2 | X | = | 17 5 |
1 2 | X | = | 17 5 | + | 320821 10000 |
1 2 | X | = | 354821 10000 |
| X | = | 354821 10000 | ÷ | 1 2 |
| = | 354821 10000 | × | 2 |
| = | 354821 5000 | × | 1 |
| X | = | 354821 5000 |
| X | = | 70.9642 |