1 | − | 2 5 | − | ( | ( | 1 | + | a | ) | ÷ | a | ) | × | 1 10 | × | 1 2 | = | 0 |
1 | − | 2 5 | − | ( | 1 | + | a | ) | ÷ | a | × | 1 10 | × | 1 2 | = | 0 |
1 | − | 2 5 | − | ( | 1 | + | a | ) | ÷ | a | × | 1 20 | = | 0 |
3 5 | − | ( | 1 | + | a | ) | ÷ | a | × | 1 20 | = | 0 |
方程两边同时乘以: | a |
3 5 | a | − | ( | 1 | + | a | ) | × | 1 20 | = | 0 |
3 5 | a | − | 1 | × | 1 20 | − | a | × | 1 20 | = | 0 |
3 5 | a | − | 1 20 | − | a | × | 1 20 | = | 0 |
11 20 | a | − | 1 20 | = | 0 |
11 20 | a | = | 0 | + | 1 20 |
11 20 | a | = | 1 20 |
a | = | 1 20 | ÷ | 11 20 |
= | 1 20 | × | 20 11 |
= | 1 | × | 1 11 |
a | = | 1 11 |
a | = | 0.090909 |