1 10 | = | ( | 7 10 | − | 3 20 | ) | − | 4 5 | ( | 1 | − | x | ) | ÷ | 4 5 | × | ( | 1 | − | x | ) |
方程右边 = | ( | 7 10 | − | 3 20 | ) | − | 1 | ( | 1 | − | x | ) | ( | 1 | − | x | ) |
1 10 | = | ( | 7 10 | − | 3 20 | ) | − | 1 | ( | 1 | − | x | ) | ( | 1 | − | x | ) |
方程右边 = | 7 10 | − | 3 20 | − | 1 | ( | 1 | − | x | ) | ( | 1 | − | x | ) |
= | 11 20 | − | 1 | ( | 1 | − | x | ) | ( | 1 | − | x | ) |
= | 11 20 | − | 1 | × | 1 | ( | 1 | − | x | ) | + | 1 | x | ( | 1 | − | x | ) |
= | 11 20 | − | 1 | ( | 1 | − | x | ) | + | 1 | x | ( | 1 | − | x | ) |
= | 11 20 | − | 1 | × | 1 | + | 1 | x | + | 1 | x | ( | 1 | − | x | ) |
= | 11 20 | − | 1 | + | 1 | x | + | 1 | x | ( | 1 | − | x | ) |
= | - | 9 20 | + | 1 | x | + | 1 | x | ( | 1 | − | x | ) |
= | - | 9 20 | + | 1 | x | + | 1 | x | × | 1 | − | 1 | x | x |
= | - | 9 20 | + | 1 | x | + | 1 | x | − | 1 | x | x |
= | - | 9 20 | + | 2 | x | − | 1 | x | x |
1 10 | = | - | 9 20 | + | 2 | x | − | 1 | x | x |