| ( | 2 | − | x | ) | ÷ | 2 | = | 771 5000 | × | 3421 5000 | x | ÷ | ( | 1 | + | 3421 5000 | x | ) |
| 方程两边同时乘以: | ( | 1 | + | 3421 5000 | x | ) |
| ( | 2 | − | x | ) | ÷ | 2 | × | ( | 1 | + | 3421 5000 | x | ) | = | 771 5000 | × | 3421 5000 | x |
| 2 | ÷ | 2 | × | ( | 1 | + | 3421 5000 | x | ) | − | x | ÷ | 2 | × | ( | 1 | + | 3421 5000 | x | ) | = | 771 5000 | × | 3421 5000 | x |
| 1 | ( | 1 | + | 3421 5000 | x | ) | − | x | × | 1 2 | ( | 1 | + | 3421 5000 | x | ) | = | 2637591 25000000 | x |
| 1 | × | 1 | + | 1 | × | 3421 5000 | x | − | x | × | 1 2 | ( | 1 | + | 3421 5000 | x | ) | = | 2637591 25000000 | x |
| 1 | + | 3421 5000 | x | − | x | × | 1 2 | ( | 1 | + | 3421 5000 | x | ) | = | 2637591 25000000 | x |
| 1 | + | 3421 5000 | x | − | x | × | 1 2 | × | 1 | − | x | × | 1 2 | × | 3421 5000 | x | = | 2637591 25000000 | x |
| 1 | + | 3421 5000 | x | − | x | × | 1 2 | − | x | × | 3421 10000 | x | = | 2637591 25000000 | x |
| 1 | + | 921 5000 | x | − | x | × | 3421 10000 | x | = | 2637591 25000000 | x |