( | x | − | ( | x | − | 30500 | ) | × | 13 100 | ) | = | 42360 |
方程左边 = | x | − | ( | x | − | 30500 | ) | × | 13 100 |
= | x | − | x | × | 13 100 | + | 30500 | × | 13 100 |
= | x | − | x | × | 13 100 | + | 3965 |
= | 87 100 | x | + | 3965 |
87 100 | x | + | 3965 | = | 42360 |
87 100 | x | = | 42360 | − | 3965 |
87 100 | x | = | 38395 |
x | = | 38395 | ÷ | 87 100 |
= | 38395 | × | 100 87 |
x | = | 3839500 87 |
x | = | 44132.183908 |