| 1 | − | 6 | ( | 1 | ÷ | X | + | 1 | ÷ | ( | X | + | 12 | ) | ) | = | ( | X | − | 6 | ) | ( | 1 | ÷ | ( | X | + | 12 | ) | ) |
| 1 | − | 6 | × | 1 | ÷ | X | − | 6 | × | 1 | ÷ | ( | X | + | 12 | ) | = | ( | X | − | 6 | ) | ( | 1 | ÷ | ( | X | + | 12 | ) | ) |
| 1 | − | 6 | × | 1 | ÷ | X | − | 6 | × | 1 | ÷ | ( | X | + | 12 | ) | = | X | ( | 1 | ÷ | ( | X | + | 12 | ) | ) | − | 6 | ( | 1 | ÷ | ( | X | + | 12 | ) | ) |
| 1 | − | 6 | ÷ | X | − | 6 | ÷ | ( | X | + | 12 | ) | = | X | ( | 1 | ÷ | ( | X | + | 12 | ) | ) | − | 6 | ( | 1 | ÷ | ( | X | + | 12 | ) | ) |
| 方程两边同时乘以: | X |
| 1 | X | − | 6 | − | 6 | ÷ | ( | X | + | 12 | ) | × | X | = | X | ( | 1 | ÷ | ( | X | + | 12 | ) | ) | X | − | 6 | ( | 1 | ÷ | ( | X | + | 12 | ) | ) | X |
| 1 | X | − | 6 | − | 6 | ÷ | ( | X | + | 12 | ) | × | X | = | X | × | 1 | ÷ | ( | X | + | 12 | ) | × | X | − | 6 | ( | 1 | ÷ | ( | X | + | 12 | ) | ) | X |
| 方程两边同时乘以: | ( | X | + | 12 | ) |
| 1 | X | ( | X | + | 12 | ) | − | 6 | ( | X | + | 12 | ) | − | 6 | X | = | X | × | 1 | X | − | 6 | ( | 1 | ÷ | ( | X | + | 12 | ) | ) | X | ( | X | + | 12 | ) |
| 1 | X | X | + | 1 | X | × | 12 | − | 6 | ( | X | + | 12 | ) | − | 6 | X | = | X | × | 1 | X | − | 6 | ( | 1 | ÷ | ( | X | + | 12 | ) | ) | X | ( | X | + | 12 | ) |
| 1 | X | X | + | 1 | X | × | 12 | − | 6 | ( | X | + | 12 | ) | − | 6 | X | = | X | × | 1 | X | − | 6 | × | 1 | ÷ | ( | X | + | 12 | ) | × | X | ( | X | + | 12 | ) |
| 1 | X | X | + | 12 | X | − | 6 | ( | X | + | 12 | ) | − | 6 | X | = | X | × | 1 | X | − | 6 | ÷ | ( | X | + | 12 | ) | × | X | ( | X | + | 12 | ) |
| 1 | X | X | + | 6 | X | − | 6 | ( | X | + | 12 | ) | = | X | × | 1 | X | − | 6 | ÷ | ( | X | + | 12 | ) | × | X | ( | X | + | 12 | ) |
| 方程两边同时乘以: | ( | X | + | 12 | ) |
| 1 | X | X | ( | X | + | 12 | ) | + | 6 | X | ( | X | + | 12 | ) | − | 6 | ( | X | + | 12 | ) | ( | X | + | 12 | ) | = | X | × | 1 | X | ( | X | + | 12 | ) | − | 6 | X | ( | X | + | 12 | ) |
| 1 | X | X | X | + | 1 | X | X | × | 12 | + | 6 | X | ( | X | + | 12 | ) | − | 6 | = | X | × | 1 | X | ( | X | + | 12 | ) | − | 6 | X | ( | X | + | 12 | ) |
| 1 | X | X | X | + | 1 | X | X | × | 12 | + | 6 | X | ( | X | + | 12 | ) | − | 6 | = | X | × | 1 | X | X | + | X | × | 1 | X | × | 12 | − | 6 | X | ( | X | + | 12 | ) |
| 1 | X | X | X | + | 12 | X | X | + | 6 | X | ( | X | + | 12 | ) | − | 6 | ( | X | + | 12 | ) | = | X | × | 1 | X | X | + | X | × | 12 | X | − | 6 | X | ( | X | + | 12 | ) |
| 1 | X | X | X | + | 12 | X | X | + | 6 | X | X | + | 6 | X | = | X | × | 1 | X | X | + | X | × | 12 | X | − | 6 | X | ( | X | + | 12 | ) |
| 1 | X | X | X | + | 12 | X | X | + | 6 | X | X | + | 6 | X | = | X | × | 1 | X | X | + | X | × | 12 | X | − | 6 | X | X | − | 6 | X |
| 1 | X | X | X | + | 12 | X | X | + | 6 | X | X | + | 72 | X | = | X | × | 1 | X | X | + | X | × | 12 | X | − | 6 | X | X | − | 72 | X |
| 1 | X | X | X | + | 12 | X | X | + | 6 | X | X | + | 72 | X | = | X | × | 1 | X | X | + | X | × | 12 | X | − | 6 | X | X | − | 72 | X |
| 1 | X | X | X | + | 12 | X | X | + | 6 | X | X | + | 72 | X | = | X | × | 1 | X | X | + | X | × | 12 | X | − | 6 | X | X | − | 72 | X |
| 1 | X | X | X | + | 12 | X | X | + | 6 | X | X | + | 72 | X | = | X | × | 1 | X | X | + | X | × | 12 | X | − | 6 | X | X | − | 72 | X |
| 1 | X | X | X | + | 12 | X | X | + | 6 | X | X | + | 72 | X | = | X | × | 1 | X | X | + | X | × | 12 | X | − | 6 | X | X | − | 72 | X |
| 1 | X | X | X | + | 12 | X | X | + | 6 | X | X | + | 0 | X | = | X | × | 1 | X | X | + | X | × | 12 | X | − | 6 | X | X | − | 72 | X |