| ( | 3 | − | X | ) | ÷ | 2 | − | ( | X | − | 8 | ) | ÷ | 3 | = | 1 |
| 方程左边 = | 3 | × | 1 2 | − | X | × | 1 2 | − | ( | X | − | 8 | ) | × | 1 3 |
| = | 3 2 | − | X | × | 1 2 | − | ( | X | − | 8 | ) | × | 1 3 |
| = | 3 2 | − | 1 2 | X | − | X | × | 1 3 | + | 8 | × | 1 3 |
| = | 3 2 | − | 1 2 | X | − | X | × | 1 3 | + | 8 3 |
| = | 25 6 | − | 5 6 | X |
25 6 | − | 5 6 | X | = | 1 |
| - | 5 6 | X | = | 1 | − | 25 6 |
| - | 5 6 | X | = | - | 19 6 |
19 6 | = | 5 6 | X |
5 6 | X | = | 19 6 |
| X | = | 19 6 | ÷ | 5 6 |
| = | 19 6 | × | 6 5 |
| = | 19 | × | 1 5 |
| X | = | 19 5 |
| X | = | 3.8 |