| ( | 15 | ÷ | 20 | + | x | − | 5 | ) | − | ( | 15 | ÷ | 20 | + | x | ) | = | 1 10 |
| Left side of the equation = | 15 | ÷ | 20 | + | x | − | 5 | − | ( | 15 | ÷ | 20 | + | x | ) |
| = | 3 4 | + | x | − | 5 | − | ( | 15 | ÷ | 20 | + | x | ) |
| = | - | 17 4 | + | x | − | ( | 15 | ÷ | 20 | + | x | ) |
| = | - | 17 4 | + | x | − | 15 | ÷ | 20 | − | x |
| = | - | 17 4 | + | x | − | 3 4 | − | x |
| = | - | 5 | + | 0 | x |
| - | 5 | + | 0 | x | = | 1 10 |
| = | 1 10 | + | 5 |