499 500 | = | ( | 1 | − | ( | 3 20 | − | 77 10000 | ) | ÷ | ( | x | − | 77 10000 | ) | ) | ( | 1 | − | 77 10000 | ) | ÷ | 17 20 |
499 500 | = | 1 | ( | 1 | − | 77 10000 | ) | ÷ | 17 20 | − | ( | 3 20 | − | 77 10000 | ) | ÷ | ( | x | − | 77 10000 | ) | × | ( | 1 | − | 77 10000 | ) | ÷ | 17 20 |
499 500 | = | 20 17 | ( | 1 | − | 77 10000 | ) | − | ( | 3 20 | − | 77 10000 | ) | ÷ | ( | x | − | 77 10000 | ) | × | ( | 1 | − | 77 10000 | ) | × | 20 17 |
| 方程两边同时乘以: | ( | x | − | 77 10000 | ) |
499 500 | ( | x | − | 77 10000 | ) | = | 20 17 | ( | 1 | − | 77 10000 | ) | ( | x | − | 77 10000 | ) | − | ( | 3 20 | − | 77 10000 | ) | ( | 1 | − | 77 10000 | ) | × | 20 17 |
499 500 | x | − | 499 500 | × | 77 10000 | = | 20 17 | ( | 1 | − | 77 10000 | ) | ( | x | − | 77 10000 | ) | − | ( | 3 20 | − | 77 10000 | ) | ( | 1 | − | 77 10000 | ) | × | 20 17 |
499 500 | x | − | 499 500 | × | 77 10000 | = | 20 17 | × | 1 | ( | x | − | 77 10000 | ) | − | 20 17 | × | 77 10000 | ( | x | − | 77 10000 | ) | − | ( | 3 20 | − | 77 10000 | ) | ( | 1 | − | 77 10000 | ) | × | 20 17 |
499 500 | x | − | 38423 5000000 | = | 20 17 | ( | x | − | 77 10000 | ) | − | 77 8500 | ( | x | − | 77 10000 | ) | − | ( | 3 20 | − | 77 10000 | ) | ( | 1 | − | 77 10000 | ) | × | 20 17 |
499 500 | x | − | 38423 5000000 | = | 20 17 | x | − | 20 17 | × | 77 10000 | − | 77 8500 | ( | x | − | 77 10000 | ) | − | ( | 3 20 | − | 77 10000 | ) | ( | 1 | − | 77 10000 | ) | × | 20 17 |
499 500 | x | − | 38423 5000000 | = | 20 17 | x | − | 77 8500 | − | 77 8500 | ( | x | − | 77 10000 | ) | − | ( | 3 20 | − | 77 10000 | ) | ( | 1 | − | 77 10000 | ) | × | 20 17 |
499 500 | x | − | 38423 5000000 | = | 20 17 | x | − | 77 8500 | − | 77 8500 | x | + | 77 8500 | × | 77 10000 | − | ( | 3 20 | − | 77 10000 | ) | ( | 1 | − | 77 10000 | ) | × | 20 17 |
499 500 | x | − | 38423 5000000 | = | 20 17 | x | − | 77 8500 | − | 77 8500 | x | + | 5929 85000000 | − | ( | 3 20 | − | 77 10000 | ) | ( | 1 | − | 77 10000 | ) | × | 20 17 |