7 | x | − | 11689 25 | − | ( | 7 | x | × | 13 100 | − | 112 | − | 14 | ) | × | 10 100 | ( | 7 | x | − | 11689 25 | ) | × | 25 100 | = | 260 |
方程左边 = | 7 | x | − | 11689 25 | − | ( | 7 | x | × | 13 100 | − | 112 | − | 14 | ) | × | 1 40 | ( | 7 | x | − | 11689 25 | ) |
7 | x | − | 11689 25 | − | ( | 7 | x | × | 13 100 | − | 112 | − | 14 | ) | × | 1 40 | ( | 7 | x | − | 11689 25 | ) | = | 260 |
方程左边 = | 7 | x | − | 11689 25 | − | 7 | x | × | 13 100 | × | 1 40 | ( | 7 | x | − | 11689 25 | ) | + | 112 | × | 1 40 | ( | 7 | x | − | 11689 25 | ) | + | 14 |
= | 7 | x | − | 11689 25 | − | 91 4000 | x | ( | 7 | x | − | 11689 25 | ) | + | 14 5 | ( | 7 | x | − | 11689 25 | ) | + | 7 20 | ( | 7 | x | − | 11689 25 | ) |
= | 7 | x | − | 11689 25 | − | 91 4000 | x | × | 7 | x | + | 91 4000 | x | × | 11689 25 | + | 14 5 | ( | 7 | x | − | 11689 25 | ) |
= | 7 | x | − | 11689 25 | − | 637 4000 | x | x | + | 1063699 100000 | x | + | 14 5 | ( | 7 | x | − | 11689 25 | ) | + | 7 20 | ( | 7 | x | − | 11689 25 | ) |
= | 1763699 100000 | x | − | 11689 25 | − | 637 4000 | x | x | + | 14 5 | ( | 7 | x | − | 11689 25 | ) | + | 7 20 | ( | 7 | x | − | 11689 25 | ) |
= | 1763699 100000 | x | − | 11689 25 | − | 637 4000 | x | x | + | 14 5 | × | 7 | x | − | 14 5 | × | 11689 25 | + | 7 20 |
= | 1763699 100000 | x | − | 11689 25 | − | 637 4000 | x | x | + | 98 5 | x | − | 163646 125 | + | 7 20 | ( | 7 | x | − | 11689 25 | ) |
= | 3723699 100000 | x | − | 222091 125 | − | 637 4000 | x | x | + | 7 20 | ( | 7 | x | − | 11689 25 | ) |
= | 3723699 100000 | x | − | 222091 125 | − | 637 4000 | x | x | + | 7 20 | × | 7 | x | − | 7 20 | × | 11689 25 |
= | 3723699 100000 | x | − | 222091 125 | − | 637 4000 | x | x | + | 49 20 | x | − | 81823 500 |
= | 3968699 100000 | x | − | 970187 500 | − | 637 4000 | x | x |
3968699 100000 | x | − | 970187 500 | − | 637 4000 | x | x | = | 260 |