| ( | 23 10 | − | x | ) | ( | 13 10 | − | x | ) | × | 1663 200 | × | 700 | = | 1387 100 | ( | 7 10 | + | x | ) | × | 10133 100 | × | 10 |
| 方程左边 = | ( | 23 10 | − | x | ) | ( | 13 10 | − | x | ) | × | 11641 2 |
| ( | 23 10 | − | x | ) | ( | 13 10 | − | x | ) | × | 11641 2 | = | 1387 100 | ( | 7 10 | + | x | ) | × | 10133 100 | × | 10 |
| 方程左边 = | 23 10 | ( | 13 10 | − | x | ) | × | 11641 2 | − | x | ( | 13 10 | − | x | ) | × | 11641 2 |
| = | 267743 20 | ( | 13 10 | − | x | ) | − | x | ( | 13 10 | − | x | ) | × | 11641 2 |
| = | 267743 20 | × | 13 10 | − | 267743 20 | x | − | x | ( | 13 10 | − | x | ) | × | 11641 2 |
| = | 3480659 200 | − | 267743 20 | x | − | x | ( | 13 10 | − | x | ) | × | 11641 2 |
| = | 3480659 200 | − | 267743 20 | x | − | x | × | 13 10 | × | 11641 2 | + | x | x | × | 11641 2 |
| = | 3480659 200 | − | 267743 20 | x | − | x | × | 151333 20 | + | x | x | × | 11641 2 |
| = | 3480659 200 | − | 104769 5 | x | + | x | x | × | 11641 2 |
3480659 200 | − | 104769 5 | x | + | x | x | × | 11641 2 | = | 1387 100 | ( | 7 10 | + | x | ) | × | 10133 100 | × | 10 |
| 方程右边 = | 14054471 1000 | ( | 7 10 | + | x | ) |
3480659 200 | − | 104769 5 | x | + | x | x | × | 11641 2 | = | 14054471 1000 | ( | 7 10 | + | x | ) |
| 方程右边 = | 14054471 1000 | × | 7 10 | + | 14054471 1000 | x |
| = | 98381297 10000 | + | 14054471 1000 | x |
3480659 200 | − | 104769 5 | x | + | x | x | × | 11641 2 | = | 98381297 10000 | + | 14054471 1000 | x |