| 3 | X | + | ( | X | + | 1 | ) | ÷ | 2 | = | 3 | − | ( | 2 | X | − | 1 | ) | ÷ | 3 |
| 方程左边 = | 3 | X | + | X | × | 1 2 | + | 1 | × | 1 2 |
| = | 3 | X | + | X | × | 1 2 | + | 1 2 |
| = | 7 2 | X | + | 1 2 |
7 2 | X | + | 1 2 | = | 3 | − | ( | 2 | X | − | 1 | ) | ÷ | 3 |
| 方程右边 = | 3 | − | 2 | X | × | 1 3 | + | 1 | × | 1 3 |
| = | 3 | − | 2 3 | X | + | 1 3 |
| = | 10 3 | − | 2 3 | X |
7 2 | X | + | 1 2 | = | 10 3 | − | 2 3 | X |
7 2 | X | + | 2 3 | X | = | 10 3 | − | 1 2 |
25 6 | X | = | 10 3 | − | 1 2 |
25 6 | X | = | 17 6 |
| X | = | 17 6 | ÷ | 25 6 |
| = | 17 6 | × | 6 25 |
| = | 17 | × | 1 25 |
| X | = | 17 25 |
| X | = | 0.68 |