7957 25 | = | 1 | ÷ | 2 | × | ( | ( | 8259 25 | − | 3751 20 | ) | x | ÷ | 2 | + | 3751 20 | × | 2 | ) | x |
| 方程右边 = | 1 2 | ( | ( | 8259 25 | − | 3751 20 | ) | x | ÷ | 2 | + | 3751 20 | × | 2 | ) | x |
7957 25 | = | 1 2 | ( | ( | 8259 25 | − | 3751 20 | ) | x | ÷ | 2 | + | 3751 20 | × | 2 | ) | x |
| 方程右边 = | 1 2 | ( | 8259 25 | − | 3751 20 | ) | x | ÷ | 2 | × | x | + | 1 2 | × | 3751 20 | × | 2 | x |
| = | 1 4 | ( | 8259 25 | − | 3751 20 | ) | x | x | + | 3751 20 | x |
| = | 1 4 | × | 8259 25 | x | x | − | 1 4 | × | 3751 20 | x | x | + | 3751 20 | x |
| = | 8259 100 | x | x | − | 3751 80 | x | x | + | 3751 20 | x |
7957 25 | = | 8259 100 | x | x | − | 3751 80 | x | x | + | 3751 20 | x |