x | ÷ | 10 | + | ( | 1 | ÷ | 15 | + | 1 | ÷ | 20 | ) | ( | 6 | − | x | ) | = | 1 |
方程左边 = | 1 10 | x | + | 1 | ÷ | 15 | × | ( | 6 | − | x | ) | + | 1 | ÷ | 20 | × | ( | 6 | − | x | ) |
= | 1 10 | x | + | 1 15 | ( | 6 | − | x | ) | + | 1 20 | ( | 6 | − | x | ) |
= | 1 10 | x | + | 1 15 | × | 6 | − | 1 15 | x | + | 1 20 | ( | 6 | − | x | ) |
= | 1 10 | x | + | 2 5 | − | 1 15 | x | + | 1 20 | ( | 6 | − | x | ) |
= | 1 30 | x | + | 2 5 | + | 1 20 | ( | 6 | − | x | ) |
= | 1 30 | x | + | 2 5 | + | 1 20 | × | 6 | − | 1 20 | x |
= | 1 30 | x | + | 2 5 | + | 3 10 | − | 1 20 | x |
= | - | 1 60 | x | + | 7 10 |
- | 1 60 | x | + | 7 10 | = | 1 |
- | 1 60 | x | = | 1 | − | 7 10 |
- | 1 60 | x | = | 3 10 |
- | 3 10 | = | 1 60 | x |
1 60 | x | = | - | 3 10 |
x | = | - | 3 10 | ÷ | 1 60 |
= | - | 3 10 | × | 60 |
= | - | 3 | × | 6 |
x | = | - | 18 |