| 1 | ÷ | 2 | + | ( | 3 | − | a | ) | ÷ | 3 | = | a | ÷ | 6 | − | 3 | a |
| Left side of the equation = | 1 2 | + | ( | 3 | − | a | ) | × | 1 3 |
1 2 | + | ( | 3 | − | a | ) | × | 1 3 | = | a | ÷ | 6 | − | 3 | a |
| Left side of the equation = | 1 2 | + | 3 | × | 1 3 | − | a | × | 1 3 |
| = | 1 2 | + | 1 | − | a | × | 1 3 |
| = | 3 2 | − | 1 3 | a |
3 2 | − | 1 3 | a | = | a | ÷ | 6 | − | 3 | a |
| Right side of the equation = | - | 17 6 | a |
3 2 | − | 1 3 | a | = | - | 17 6 | a |
| - | 1 3 | a | + | 17 6 | a | = | - | 3 2 |
5 2 | a | = | - | 3 2 |
| a | = | - | 3 2 | ÷ | 5 2 |
| = | - | 3 2 | × | 2 5 |
| = | - | 3 | × | 1 5 |
| a | = | - | 3 5 |
| a | = | - 0.6 |