| ( | 2 | k | + | 2 | ) | × | 2 | ÷ | k | × | 2 | + | 1 | ( | 1 | + | k | ) | × | 2 | ( | - | 4 | k | ÷ | 3 | − | k | × | 2 | ) | × | 2 | − | 4 | ÷ | 3 | × | k | = | 1440 |
| 方程两边同时乘以: | k |
| ( | 2 | k | + | 2 | ) | × | 2 | × | 2 | + | 1 | ( | 1 | + | k | ) | × | 2 | ( | - | 4 | k | ÷ | 3 | − | k | × | 2 | ) | × | 2 | k | − | 4 | ÷ | 3 | × | k | = | 1440 | k |
| 2 | k | × | 2 | × | 2 | + | 2 | × | 2 | × | 2 | + | 1 | ( | 1 | + | k | ) | × | 2 | ( | - | 4 | k | ÷ | 3 | − | k | × | 2 | ) | × | 2 | = | 1440 | k |
| 8 | k | + | 8 | + | 4 | ( | 1 | + | k | ) | ( | - | 4 | k | ÷ | 3 | − | k | × | 2 | ) | k | − | 8 3 | k | k | = | 1440 | k |
| 8 | k | + | 8 | + | 4 | × | 1 | ( | - | 4 | k | ÷ | 3 | − | k | × | 2 | ) | k | + | 4 | k | ( | - | 4 | k | ÷ | 3 | − | k | × | 2 | ) | k | − | 8 3 | = | 1440 | k |
| 8 | k | + | 8 | + | 4 | ( | - | 4 | k | ÷ | 3 | − | k | × | 2 | ) | k | + | 4 | k | ( | - | 4 | k | ÷ | 3 | − | k | × | 2 | ) | k | − | 8 3 | k | = | 1440 | k |
| 8 | k | + | 8 | − | 4 | × | 4 | k | ÷ | 3 | × | k | − | 4 | k | × | 2 | k | = | 1440 | k |
| 8 | k | + | 8 | − | 16 3 | k | k | − | 8 | k | k | + | 4 | k | ( | - | 4 | k | ÷ | 3 | − | k | × | 2 | ) | = | 1440 | k |
| 8 | k | + | 8 | − | 16 3 | k | k | − | 8 | k | k | − | 4 | k | × | 4 | = | 1440 | k |
| 8 | k | + | 8 | − | 16 3 | k | k | − | 8 | k | k | − | 16 3 | k | k | = | 1440 | k |