( | 85 | − | 83 | ) | ( | 100 | − | x | ) | = | ( | 98 | − | 85 | ) | ( | x | − | 86 | ) |
方程左边 = | 85 | ( | 100 | − | x | ) | − | 83 | ( | 100 | − | x | ) |
= | 85 | × | 100 | − | 85 | x | − | 83 | ( | 100 | − | x | ) |
= | 8500 | − | 85 | x | − | 83 | ( | 100 | − | x | ) |
= | 8500 | − | 85 | x | − | 83 | × | 100 | + | 83 | x |
= | 8500 | − | 85 | x | − | 8300 | + | 83 | x |
= | 200 | − | 2 | x |
200 | − | 2 | x | = | ( | 98 | − | 85 | ) | ( | x | − | 86 | ) |
方程右边 = | 98 | ( | x | − | 86 | ) | − | 85 | ( | x | − | 86 | ) |
= | 98 | x | − | 98 | × | 86 | − | 85 | ( | x | − | 86 | ) |
= | 98 | x | − | 8428 | − | 85 | ( | x | − | 86 | ) |
= | 98 | x | − | 8428 | − | 85 | x | + | 85 | × | 86 |
= | 98 | x | − | 8428 | − | 85 | x | + | 7310 |
= | 13 | x | − | 1118 |
200 | − | 2 | x | = | 13 | x | − | 1118 |
- | 2 | x | − | 13 | x | = | - | 1118 | − | 200 |
- | 15 | x | = | - | 1118 | − | 200 |
- | 15 | x | = | - | 1318 |
1318 | = | 15 | x |
15 | x | = | 1318 |
x | = | 1318 | ÷ | 15 |
= | 1318 | × | 1 15 |
x | = | 1318 15 |
x | = | 87.866667 |