| 5 | ( | X | − | 1 | ) | + | 1 | ÷ | 2 | = | ( | X | − | 1 | ) | + | ( | 2 | ÷ | 9 | + | 3 | ÷ | 2 | ) |
| 方程左边 = | 5 | ( | X | − | 1 | ) | + | 1 2 |
| 5 | ( | X | − | 1 | ) | + | 1 2 | = | ( | X | − | 1 | ) | + | ( | 2 | ÷ | 9 | + | 3 | ÷ | 2 | ) |
| 方程左边 = | 5 | X | − | 5 | × | 1 | + | 1 2 |
| = | 5 | X | − | 5 | + | 1 2 |
| = | 5 | X | − | 9 2 |
| 5 | X | − | 9 2 | = | ( | X | − | 1 | ) | + | ( | 2 | ÷ | 9 | + | 3 | ÷ | 2 | ) |
| 方程右边 = | X | − | 1 | + | ( | 2 | ÷ | 9 | + | 3 | ÷ | 2 | ) |
| = | X | − | 1 | + | 2 | ÷ | 9 | + | 3 | ÷ | 2 |
| = | X | − | 1 | + | 2 9 | + | 3 2 |
| = | X | + | 13 18 |
| 5 | X | − | 9 2 | = | X | + | 13 18 |
| 5 | X | − | X | = | 13 18 | + | 9 2 |
| 4 | X | = | 13 18 | + | 9 2 |
| 4 | X | = | 47 9 |
| X | = | 47 9 | ÷ | 4 |
| = | 47 9 | × | 1 4 |
| X | = | 47 36 |
| X | = | 1.305556 |