| 3 | ÷ | 1 | × | ( | X | − | 4 | ) | = | 3 | − | 2 | ÷ | 3 | × | ( | X | − | 4 | ) |
| 方程左边 = | 3 | ( | X | − | 4 | ) |
| 3 | ( | X | − | 4 | ) | = | 3 | − | 2 | ÷ | 3 | × | ( | X | − | 4 | ) |
| 方程左边 = | 3 | X | − | 3 | × | 4 |
| = | 3 | X | − | 12 |
| 3 | X | − | 12 | = | 3 | − | 2 | ÷ | 3 | × | ( | X | − | 4 | ) |
| 方程右边 = | 3 | − | 2 3 | ( | X | − | 4 | ) |
| 3 | X | − | 12 | = | 3 | − | 2 3 | ( | X | − | 4 | ) |
| 方程右边 = | 3 | − | 2 3 | X | + | 2 3 | × | 4 |
| = | 3 | − | 2 3 | X | + | 8 3 |
| = | 17 3 | − | 2 3 | X |
| 3 | X | − | 12 | = | 17 3 | − | 2 3 | X |
| 3 | X | + | 2 3 | X | = | 17 3 | + | 12 |
11 3 | X | = | 17 3 | + | 12 |
11 3 | X | = | 53 3 |
| X | = | 53 3 | ÷ | 11 3 |
| = | 53 3 | × | 3 11 |
| = | 53 | × | 1 11 |
| X | = | 53 11 |
| X | = | 4.818182 |