| x | − | ( | x | − | 800 | ) | × | 1 5 | = | 170829 50 |
| Left side of the equation = | x | − | x | × | 1 5 | + | 800 | × | 1 5 |
| = | x | − | x | × | 1 5 | + | 160 |
| = | 4 5 | x | + | 160 |
4 5 | x | + | 160 | = | 170829 50 |
4 5 | x | = | 170829 50 | − | 160 |
4 5 | x | = | 162829 50 |
| x | = | 162829 50 | ÷ | 4 5 |
| = | 162829 50 | × | 5 4 |
| = | 162829 10 | × | 1 4 |
| x | = | 162829 40 |
| x | = | 4070.725 |
| x | = | 0 |