30 100 | x | + | ( | - | 23 100 | ) | ( | 1 | − | x | ) | = | 4 100 |
方程左边 = | 30 100 | x | − | 23 100 | ( | 1 | − | x | ) |
= | 30 100 | x | − | 23 100 | × | 1 | + | 23 100 | x |
= | 30 100 | x | − | 23 100 | + | 23 100 | x |
= | 53 100 | x | − | 23 100 |
53 100 | x | − | 23 100 | = | 4 100 |
53 100 | x | = | 4 100 | + | 23 100 |
53 100 | x | = | 27 100 |
x | = | 27 100 | ÷ | 53 100 |
= | 27 100 | × | 100 53 |
= | 27 | × | 1 53 |
x | = | 27 53 |
x | = | 0.509434 |