| 2 | X | ÷ | 3 10 | − | ( | 8 5 | − | 3 | X | ) | ÷ | 3 5 | = | ( | 31 | X | + | 8 | ) | ÷ | 2 |
| 方程左边 = | 20 3 | X | − | ( | 8 5 | − | 3 | X | ) | × | 5 3 |
20 3 | X | − | ( | 8 5 | − | 3 | X | ) | × | 5 3 | = | ( | 31 | X | + | 8 | ) | ÷ | 2 |
| 方程左边 = | 20 3 | X | − | 8 5 | × | 5 3 | + | 3 | X | × | 5 3 |
| = | 20 3 | X | − | 8 3 | + | 5 | X |
| = | 35 3 | X | − | 8 3 |
35 3 | X | − | 8 3 | = | ( | 31 | X | + | 8 | ) | ÷ | 2 |
| 方程右边 = | 31 | X | × | 1 2 | + | 8 | × | 1 2 |
| = | 31 2 | X | + | 4 |
35 3 | X | − | 8 3 | = | 31 2 | X | + | 4 |
35 3 | X | − | 31 2 | X | = | 4 | + | 8 3 |
| - | 23 6 | X | = | 4 | + | 8 3 |
| - | 23 6 | X | = | 20 3 |
| - | 20 3 | = | 23 6 | X |
23 6 | X | = | - | 20 3 |
| X | = | - | 20 3 | ÷ | 23 6 |
| = | - | 20 3 | × | 6 23 |
| = | - | 20 | × | 2 23 |
| X | = | - | 40 23 |
| X | = | - 1.73913 |