( | 20 100 | − | x | ) | ÷ | ( | 20 100 | − | 19 100 | ) | = | ( | - | 7 25 | − | 0 | ) | ÷ | ( | - | 7 25 | − | 2 25 | ) |
方程两边同时乘以: | ( | 20 100 | − | 19 100 | ) | , | ( | - | 7 25 | − | 2 25 | ) |
( | 20 100 | − | x | ) | ( | - | 7 25 | − | 2 25 | ) | = | ( | - | 7 25 | − | 0 | ) | ( | 20 100 | − | 19 100 | ) |
20 100 | ( | - | 7 25 | − | 2 25 | ) | − | x | ( | - | 7 25 | − | 2 25 | ) | = | ( | - | 7 25 | − | 0 | ) | ( | 20 100 | − | 19 100 | ) |
20 100 | ( | - | 7 25 | − | 2 25 | ) | − | x | ( | - | 7 25 | − | 2 25 | ) | = | - | 7 25 | ( | 20 100 | − | 19 100 | ) | − | 0 | ( | 20 100 | − | 19 100 | ) |
- | 20 100 | × | 7 25 | − | 20 100 | × | 2 25 | − | x | ( | - | 7 25 | − | 2 25 | ) | = | - | 7 25 | ( | 20 100 | − | 19 100 | ) | − | 0 | ( | 20 100 | − | 19 100 | ) |
- | 20 100 | × | 7 25 | − | 20 100 | × | 2 25 | − | x | ( | - | 7 25 | − | 2 25 | ) | = | - | 7 25 | × | 20 100 | + | 7 25 | × | 19 100 | − | 0 | ( | 20 100 | − | 19 100 | ) |
- | 7 125 | − | 2 125 | − | x | ( | - | 7 25 | − | 2 25 | ) | = | - | 7 125 | + | 133 2500 | − | 0 | ( | 20 100 | − | 19 100 | ) |
- | 9 125 | − | x | ( | - | 7 25 | − | 2 25 | ) | = | - | 7 2500 | − | 0 | ( | 20 100 | − | 19 100 | ) |
- | 9 125 | + | x | × | 7 25 | + | x | × | 2 25 | = | - | 7 2500 |
- | 9 125 | + | 9 25 | x | = | - | 7 2500 |
9 25 | x | = | - | 7 2500 | + | 9 125 |
9 25 | x | = | 173 2500 |
x | = | 173 2500 | ÷ | 9 25 |
= | 173 2500 | × | 25 9 |
= | 173 100 | × | 1 9 |
x | = | 173 900 |
x | = | 0.192222 |