( | 1 | ÷ | 3 | ) | X | − | ( | 1 | ÷ | 10 | ) | X | ( | 100 | − | X | ) | = | 16 |
方程左边 = | 1 | ÷ | 3 | × | X | − | ( | 1 | ÷ | 10 | ) | X | ( | 100 | − | X | ) |
= | 1 3 | X | − | ( | 1 | ÷ | 10 | ) | X | ( | 100 | − | X | ) |
= | 1 3 | X | − | 1 | ÷ | 10 | × | X | ( | 100 | − | X | ) |
= | 1 3 | X | − | 1 10 | X | ( | 100 | − | X | ) |
= | 1 3 | X | − | 1 10 | X | × | 100 | + | 1 10 | X | X |
= | 1 3 | X | − | 10 | X | + | 1 10 | X | X |
= | - | 29 3 | X | + | 1 10 | X | X |
- | 29 3 | X | + | 1 10 | X | X | = | 16 |