( | 1 | − | 1 | ÷ | 5 | ) | ( | 31 10 | − | x | ) | = | ( | 1 | − | 1 | ÷ | 4 | ) | x |
方程左边 = | 1 | ( | 31 10 | − | x | ) | − | 1 | ÷ | 5 | × | ( | 31 10 | − | x | ) |
= | 1 | ( | 31 10 | − | x | ) | − | 1 5 | ( | 31 10 | − | x | ) |
= | 1 | × | 31 10 | − | 1 | x | − | 1 5 | ( | 31 10 | − | x | ) |
= | 31 10 | − | 1 | x | − | 1 5 | ( | 31 10 | − | x | ) |
= | 31 10 | − | 1 | x | − | 1 5 | × | 31 10 | + | 1 5 | x |
= | 31 10 | − | 1 | x | − | 31 50 | + | 1 5 | x |
= | 62 25 | − | 4 5 | x |
62 25 | − | 4 5 | x | = | ( | 1 | − | 1 | ÷ | 4 | ) | x |
方程右边 = | 1 | x | − | 1 | ÷ | 4 | × | x |
= | 1 | x | − | 1 4 | x |
= | 3 4 | x |
62 25 | − | 4 5 | x | = | 3 4 | x |
- | 4 5 | x | − | 3 4 | x | = | - | 62 25 |
- | 31 20 | x | = | - | 62 25 |
62 25 | = | 31 20 | x |
31 20 | x | = | 62 25 |
x | = | 62 25 | ÷ | 31 20 |
= | 62 25 | × | 20 31 |
= | 2 5 | × | 4 |
x | = | 8 5 |
x | = | 1.6 |