| 5 | ÷ | 80 | × | ( | x | − | 2 | ) | + | 20 | x | = | 1 |
| Left side of the equation = | 1 16 | ( | x | − | 2 | ) | + | 20 | x |
1 16 | ( | x | − | 2 | ) | + | 20 | x | = | 1 |
| Left side of the equation = | 1 16 | x | − | 1 16 | × | 2 | + | 20 | x |
| = | 1 16 | x | − | 1 8 | + | 20 | x |
| = | 321 16 | x | − | 1 8 |
321 16 | x | − | 1 8 | = | 1 |
321 16 | x | = | 1 | + | 1 8 |
321 16 | x | = | 9 8 |
| x | = | 9 8 | ÷ | 321 16 |
| = | 9 8 | × | 16 321 |
| = | 3 | × | 2 107 |
| x | = | 6 107 |
| x | = | 0.056075 |