( | x | − | 30 | ) | ( | 1 | − | 20 100 | ) | ÷ | 240 | = | ( | x | − | 55 | ) | ( | 1 | − | 20 100 | ) | ÷ | 200 |
方程左边 = | x | ( | 1 | − | 20 100 | ) | × | 1 240 | − | 30 | ( | 1 | − | 20 100 | ) | × | 1 240 |
= | x | ( | 1 | − | 20 100 | ) | × | 1 240 | − | 1 8 | ( | 1 | − | 20 100 | ) |
= | x | × | 1 | × | 1 240 | − | x | × | 20 100 | × | 1 240 | − | 1 8 | ( | 1 | − | 20 100 | ) |
= | x | × | 1 240 | − | x | × | 1 1200 | − | 1 8 | ( | 1 | − | 20 100 | ) |
= | 1 300 | x | − | 1 8 | ( | 1 | − | 20 100 | ) |
= | 1 300 | x | − | 1 8 | × | 1 | + | 1 8 | × | 20 100 |
= | 1 300 | x | − | 1 8 | + | 1 40 |
= | 1 300 | x | − | 1 10 |
1 300 | x | − | 1 10 | = | ( | x | − | 55 | ) | ( | 1 | − | 20 100 | ) | ÷ | 200 |
方程右边 = | x | ( | 1 | − | 20 100 | ) | × | 1 200 | − | 55 | ( | 1 | − | 20 100 | ) | × | 1 200 |
= | x | ( | 1 | − | 20 100 | ) | × | 1 200 | − | 11 40 | ( | 1 | − | 20 100 | ) |
= | x | × | 1 | × | 1 200 | − | x | × | 20 100 | × | 1 200 | − | 11 40 | ( | 1 | − | 20 100 | ) |
= | x | × | 1 200 | − | x | × | 1 1000 | − | 11 40 | ( | 1 | − | 20 100 | ) |
= | 1 250 | x | − | 11 40 | ( | 1 | − | 20 100 | ) |
= | 1 250 | x | − | 11 40 | × | 1 | + | 11 40 | × | 20 100 |
= | 1 250 | x | − | 11 40 | + | 11 200 |
= | 1 250 | x | − | 11 50 |
1 300 | x | − | 1 10 | = | 1 250 | x | − | 11 50 |
1 300 | x | − | 1 250 | x | = | - | 11 50 | + | 1 10 |
- | 1 1500 | x | = | - | 11 50 | + | 1 10 |
- | 1 1500 | x | = | - | 3 25 |
3 25 | = | 1 1500 | x |
1 1500 | x | = | 3 25 |
x | = | 3 25 | ÷ | 1 1500 |
= | 3 25 | × | 1500 |
= | 3 | × | 60 |
x | = | 180 |