| ( | 4771 10 | − | 2104 5 | x | ) | ( | 483 500 | − | 1 20 | x | ) | + | 144 | − | 2861 10 | x | = | 0 |
| 方程左边 = | 4771 10 | ( | 483 500 | − | 1 20 | x | ) | − | 2104 5 | x | ( | 483 500 | − | 1 20 | x | ) | + | 144 | − | 2861 10 | x |
| = | 4771 10 | × | 483 500 | − | 4771 10 | × | 1 20 | x | − | 2104 5 | x | ( | 483 500 | − | 1 20 | x | ) | + | 144 | − | 2861 10 | x |
| = | 2304393 5000 | − | 4771 200 | x | − | 2104 5 | x | ( | 483 500 | − | 1 20 | x | ) | + | 144 | − | 2861 10 | x |
| = | 3024393 5000 | − | 61991 200 | x | − | 2104 5 | x | ( | 483 500 | − | 1 20 | x | ) |
| = | 3024393 5000 | − | 61991 200 | x | − | 2104 5 | x | × | 483 500 | + | 2104 5 | x | × | 1 20 | x |
| = | 3024393 5000 | − | 61991 200 | x | − | 254058 625 | x | + | 526 25 | x | x |
| = | 3024393 5000 | − | 3582239 5000 | x | + | 526 25 | x | x |
3024393 5000 | − | 3582239 5000 | x | + | 526 25 | x | x | = | 0 |