| 2 | ( | a | − | 3 | ) | = | 1 | ÷ | 3 | × | ( | 2 | a | − | 1 | ) |
| 方程左边 = | 2 | a | − | 2 | × | 3 |
| = | 2 | a | − | 6 |
| 2 | a | − | 6 | = | 1 | ÷ | 3 | × | ( | 2 | a | − | 1 | ) |
| 方程右边 = | 1 3 | ( | 2 | a | − | 1 | ) |
| 2 | a | − | 6 | = | 1 3 | ( | 2 | a | − | 1 | ) |
| 方程右边 = | 1 3 | × | 2 | a | − | 1 3 | × | 1 |
| = | 2 3 | a | − | 1 3 |
| 2 | a | − | 6 | = | 2 3 | a | − | 1 3 |
| 2 | a | − | 2 3 | a | = | - | 1 3 | + | 6 |
4 3 | a | = | - | 1 3 | + | 6 |
4 3 | a | = | 17 3 |
| a | = | 17 3 | ÷ | 4 3 |
| = | 17 3 | × | 3 4 |
| = | 17 | × | 1 4 |
| a | = | 17 4 |
| a | = | 4.25 |