( | x | + | 400 | ) | − | 5 100 | ( | x | + | 400 | ) | − | 47309 100 | = | 134283 50 |
方程左边 = | x | + | 400 | − | 5 100 | ( | x | + | 400 | ) | − | 47309 100 |
= | x | − | 7309 100 | − | 5 100 | ( | x | + | 400 | ) |
= | x | − | 7309 100 | − | 5 100 | x | − | 5 100 | × | 400 |
= | x | − | 7309 100 | − | 5 100 | x | − | 20 |
= | 19 20 | x | − | 9309 100 |
19 20 | x | − | 9309 100 | = | 134283 50 |
19 20 | x | = | 134283 50 | + | 9309 100 |
19 20 | x | = | 11115 4 |
x | = | 11115 4 | ÷ | 19 20 |
= | 11115 4 | × | 20 19 |
= | 585 | × | 5 |
x | = | 2925 |