1 | ÷ | 4 | × | ( | - | 2 100 | ) | + | 3 | ÷ | 4 | × | ( | 10 100 | ) | ( | 1 | − | a | ) | = | 0 |
方程左边 = | 1 4 | ( | - | 2 100 | ) | + | 3 4 | ( | 10 100 | ) | ( | 1 | − | a | ) |
1 4 | ( | - | 2 100 | ) | + | 3 4 | ( | 10 100 | ) | ( | 1 | − | a | ) | = | 0 |
方程左边 = | - | 1 4 | × | 2 100 | + | 3 4 | ( | 10 100 | ) | ( | 1 | − | a | ) |
= | - | 1 200 | + | 3 4 | ( | 10 100 | ) | ( | 1 | − | a | ) |
= | - | 1 200 | + | 3 4 | × | 10 100 | ( | 1 | − | a | ) |
= | - | 1 200 | + | 3 40 | ( | 1 | − | a | ) |
= | - | 1 200 | + | 3 40 | × | 1 | − | 3 40 | a |
= | - | 1 200 | + | 3 40 | − | 3 40 | a |
= | 7 100 | − | 3 40 | a |
7 100 | − | 3 40 | a | = | 0 |
- | 3 40 | a | = | 0 | − | 7 100 |
- | 3 40 | a | = | - | 7 100 |
7 100 | = | 3 40 | a |
3 40 | a | = | 7 100 |
a | = | 7 100 | ÷ | 3 40 |
= | 7 100 | × | 40 3 |
= | 7 5 | × | 2 3 |
a | = | 14 15 |
a | = | 0.933333 |