( | 297 10 | − | 20 | ) | ÷ | ( | 30 | − | 297 10 | ) | = | ( | a | − | 21 20 | ) | ÷ | ( | 8007 10000 | − | a | ) |
方程两边同时乘以: | ( | 30 | − | 297 10 | ) | , | ( | 8007 10000 | − | a | ) |
( | 297 10 | − | 20 | ) | ( | 8007 10000 | − | a | ) | = | ( | a | − | 21 20 | ) | ( | 30 | − | 297 10 | ) |
297 10 | ( | 8007 10000 | − | a | ) | − | 20 | ( | 8007 10000 | − | a | ) | = | ( | a | − | 21 20 | ) | ( | 30 | − | 297 10 | ) |
297 10 | ( | 8007 10000 | − | a | ) | − | 20 | ( | 8007 10000 | − | a | ) | = | a | ( | 30 | − | 297 10 | ) | − | 21 20 | ( | 30 | − | 297 10 | ) |
297 10 | × | 8007 10000 | − | 297 10 | a | − | 20 | ( | 8007 10000 | − | a | ) | = | a | ( | 30 | − | 297 10 | ) | − | 21 20 | ( | 30 | − | 297 10 | ) |
297 10 | × | 8007 10000 | − | 297 10 | a | − | 20 | ( | 8007 10000 | − | a | ) | = | a | × | 30 | − | a | × | 297 10 | − | 21 20 | ( | 30 | − | 297 10 | ) |
2378079 100000 | − | 297 10 | a | − | 20 | ( | 8007 10000 | − | a | ) | = | a | × | 30 | − | a | × | 297 10 | − | 21 20 | ( | 30 | − | 297 10 | ) |
2378079 100000 | − | 297 10 | a | − | 20 | ( | 8007 10000 | − | a | ) | = | 3 10 | a | − | 21 20 | ( | 30 | − | 297 10 | ) |
2378079 100000 | − | 297 10 | a | − | 20 | × | 8007 10000 | + | 20 | a | = | 3 10 | a | − | 21 20 | ( | 30 | − | 297 10 | ) |
2378079 100000 | − | 297 10 | a | − | 20 | × | 8007 10000 | + | 20 | a | = | 3 10 | a | − | 21 20 | × | 30 | + | 21 20 | × | 297 10 |
2378079 100000 | − | 297 10 | a | − | 8007 500 | + | 20 | a | = | 3 10 | a | − | 63 2 | + | 6237 200 |
776679 100000 | − | 97 10 | a | = | 3 10 | a | − | 63 200 |
- | 97 10 | a | − | 3 10 | a | = | - | 63 200 | − | 776679 100000 |
- | 10 | a | = | - | 63 200 | − | 776679 100000 |
- | 10 | a | = | - | 808179 100000 |
808179 100000 | = | 10 | a |
10 | a | = | 808179 100000 |
a | = | 808179 100000 | ÷ | 10 |
= | 808179 100000 | × | 1 10 |
a | = | 808179 1000000 |
a | = | 0.808179 |