| ( | 5 | x | − | 4 | ) | ÷ | ( | x | − | 2 | ) | = | ( | 4 | x | + | 10 | ) | ÷ | ( | 3 | x | − | 6 | ) | − | 1 |
| 方程两边同时乘以: | ( | x | − | 2 | ) | , | ( | 3 | x | − | 6 | ) |
| ( | 5 | x | − | 4 | ) | ( | 3 | x | − | 6 | ) | = | ( | 4 | x | + | 10 | ) | ( | x | − | 2 | ) | − | 1 | ( | x | − | 2 | ) | ( | 3 | x | − | 6 | ) |
| 5 | x | ( | 3 | x | − | 6 | ) | − | 4 | ( | 3 | x | − | 6 | ) | = | ( | 4 | x | + | 10 | ) | ( | x | − | 2 | ) | − | 1 | ( | x | − | 2 | ) | ( | 3 | x | − | 6 | ) |
| 5 | x | ( | 3 | x | − | 6 | ) | − | 4 | ( | 3 | x | − | 6 | ) | = | 4 | x | ( | x | − | 2 | ) | + | 10 | ( | x | − | 2 | ) | − | 1 | ( | x | − | 2 | ) | ( | 3 | x | − | 6 | ) |
| 5 | x | × | 3 | x | − | 5 | x | × | 6 | − | 4 | ( | 3 | x | − | 6 | ) | = | 4 | x | ( | x | − | 2 | ) | + | 10 | ( | x | − | 2 | ) | − | 1 | ( | x | − | 2 | ) | ( | 3 | x | − | 6 | ) |
| 5 | x | × | 3 | x | − | 5 | x | × | 6 | − | 4 | ( | 3 | x | − | 6 | ) | = | 4 | x | x | − | 4 | x | × | 2 | + | 10 | ( | x | − | 2 | ) | − | 1 | ( | x | − | 2 | ) | ( | 3 | x | − | 6 | ) |
| 15 | x | x | − | 30 | x | − | 4 | ( | 3 | x | − | 6 | ) | = | 4 | x | x | − | 8 | x | + | 10 | ( | x | − | 2 | ) | − | 1 | ( | x | − | 2 | ) | ( | 3 | x | − | 6 | ) |
| 15 | x | x | − | 30 | x | − | 4 | × | 3 | x | + | 4 | × | 6 | = | 4 | x | x | − | 8 | x | + | 10 | ( | x | − | 2 | ) | − | 1 | ( | x | − | 2 | ) | ( | 3 | x | − | 6 | ) |
| 15 | x | x | − | 30 | x | − | 4 | × | 3 | x | + | 4 | × | 6 | = | 4 | x | x | − | 8 | x | + | 10 | x | − | 10 | × | 2 | − | 1 | ( | x | − | 2 | ) | ( | 3 | x | − | 6 | ) |
| 15 | x | x | − | 30 | x | − | 12 | x | + | 24 | = | 4 | x | x | − | 8 | x | + | 10 | x | − | 20 | − | 1 | ( | x | − | 2 | ) | ( | 3 | x | − | 6 | ) |
| 15 | x | x | − | 42 | x | + | 24 | = | 4 | x | x | + | 2 | x | − | 20 | − | 1 | ( | x | − | 2 | ) | ( | 3 | x | − | 6 | ) |
| 15 | x | x | − | 42 | x | + | 24 | = | 4 | x | x | + | 2 | x | − | 20 | − | 1 | x | ( | 3 | x | − | 6 | ) | + | 1 | × | 2 | ( | 3 | x | − | 6 | ) |
| 15 | x | x | − | 42 | x | + | 24 | = | 4 | x | x | + | 2 | x | − | 20 | − | 1 | x | ( | 3 | x | − | 6 | ) | + | 2 | ( | 3 | x | − | 6 | ) |
| 15 | x | x | − | 42 | x | + | 24 | = | 4 | x | x | + | 2 | x | − | 20 | − | 1 | x | × | 3 | x | + | 1 | x |
| 15 | x | x | − | 42 | x | + | 24 | = | 4 | x | x | + | 2 | x | − | 20 | − | 3 | x | x | + | 6 | x | + | 2 |
| 15 | x | x | − | 42 | x | + | 24 | = | 4 | x | x | + | 8 | x | − | 20 | − | 3 | x | x | + | 2 | ( | 3 | x | − | 6 | ) |
| 15 | x | x | − | 42 | x | + | 24 | = | 4 | x | x | + | 8 | x | − | 20 | − | 3 | x | x | + | 2 | × | 3 | x |
| 15 | x | x | − | 42 | x | + | 24 | = | 4 | x | x | + | 8 | x | − | 20 | − | 3 | x | x | + | 6 | x | − | 12 |
| 15 | x | x | − | 42 | x | + | 24 | = | 4 | x | x | + | 14 | x | − | 32 | − | 3 | x | x |