| ( | 1 | + | 1 50 | x | ) | × | 1000 | ( | 1 | − | 1 100 | x | ) | + | 2000 | × | 100 | ( | 1 | + | 1 100 | x | ) | ( | 1 | − | 1 100 | x | ) | = | 1000 | − | 100 | + | 2000 | × | 150 |
| 方程左边 = | ( | 1 | + | 1 50 | x | ) | × | 1000 | ( | 1 | − | 1 100 | x | ) | + | 200000 | ( | 1 | + | 1 100 | x | ) | ( | 1 | − | 1 100 | x | ) |
| ( | 1 | + | 1 50 | x | ) | × | 1000 | ( | 1 | − | 1 100 | x | ) | + | 200000 | ( | 1 | + | 1 100 | x | ) | ( | 1 | − | 1 100 | x | ) | = | 1000 | − | 100 | + | 2000 | × | 150 |
| 方程左边 = | 1 | × | 1000 | ( | 1 | − | 1 100 | x | ) | + | 1 50 | x | × | 1000 | ( | 1 | − | 1 100 | x | ) | + | 200000 | ( | 1 | + | 1 100 | x | ) | ( | 1 | − | 1 100 | x | ) |
| = | 1000 | ( | 1 | − | 1 100 | x | ) | + | 20 | x | ( | 1 | − | 1 100 | x | ) | + | 200000 | ( | 1 | + | 1 100 | x | ) | ( | 1 | − | 1 100 | x | ) |
| = | 1000 | × | 1 | − | 1000 | × | 1 100 | x | + | 20 | x | ( | 1 | − | 1 100 | x | ) | + | 200000 | ( | 1 | + | 1 100 | x | ) | ( | 1 | − | 1 100 | x | ) |
| = | 1000 | − | 10 | x | + | 20 | x | ( | 1 | − | 1 100 | x | ) | + | 200000 | ( | 1 | + | 1 100 | x | ) | ( | 1 | − | 1 100 | x | ) |
| = | 1000 | − | 10 | x | + | 20 | x | × | 1 | − | 20 | x | × | 1 100 | x | + | 200000 | ( | 1 | + | 1 100 | x | ) |
| = | 1000 | − | 10 | x | + | 20 | x | − | 1 5 | x | x | + | 200000 | ( | 1 | + | 1 100 | x | ) | ( | 1 | − | 1 100 | x | ) |
| = | 1000 | + | 10 | x | − | 1 5 | x | x | + | 200000 | ( | 1 | + | 1 100 | x | ) | ( | 1 | − | 1 100 | x | ) |
| = | 1000 | + | 10 | x | − | 1 5 | x | x | + | 200000 | × | 1 | ( | 1 | − | 1 100 | x | ) | + | 200000 | × | 1 100 | x |
| = | 1000 | + | 10 | x | − | 1 5 | x | x | + | 200000 | ( | 1 | − | 1 100 | x | ) | + | 2000 | x | ( | 1 | − | 1 100 | x | ) |
| = | 1000 | + | 10 | x | − | 1 5 | x | x | + | 200000 | × | 1 | − | 200000 | × | 1 100 | x | + | 2000 |
| = | 1000 | + | 10 | x | − | 1 5 | x | x | + | 200000 | − | 2000 | x | + | 2000 | x | ( | 1 | − | 1 100 | x | ) |
| = | 201000 | − | 1990 | x | − | 1 5 | x | x | + | 2000 | x | ( | 1 | − | 1 100 | x | ) |
| = | 201000 | − | 1990 | x | − | 1 5 | x | x | + | 2000 | x | × | 1 | − | 2000 | x | × | 1 100 |
| = | 201000 | − | 1990 | x | − | 1 5 | x | x | + | 2000 | x | − | 20 | x | x |
| = | 201000 | + | 10 | x | − | 1 5 | x | x | − | 20 | x | x |
| 201000 | + | 10 | x | − | 1 5 | x | x | − | 20 | x | x | = | 1000 | − | 100 | + | 2000 | × | 150 |
| 方程右边 = | 1000 | − | 100 | + | 300000 |
| = | 300900 |
| 201000 | + | 10 | x | − | 1 5 | x | x | − | 20 | x | x | = | 300900 |