| 1 | ÷ | 20 | × | ( | 16 | − | x | ) | + | 7 | ÷ | 100 | × | x | = | 0 |
| Left side of the equation = | 1 20 | ( | 16 | − | x | ) | + | 7 100 | x |
1 20 | ( | 16 | − | x | ) | + | 7 100 | x | = | 0 |
| Left side of the equation = | 1 20 | × | 16 | − | 1 20 | x | + | 7 100 | x |
| = | 4 5 | − | 1 20 | x | + | 7 100 | x |
| = | 4 5 | + | 1 50 | x |
4 5 | + | 1 50 | x | = | 0 |
1 50 | x | = | 0 | − | 4 5 |
1 50 | x | = | - | 4 5 |
| x | = | - | 4 5 | ÷ | 1 50 |
| = | - | 4 5 | × | 50 |
| = | - | 4 | × | 10 |
| x | = | - | 40 |