( | 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 | ) |
( | 20 100 | − | x | ) | = | ( | - | 7 25 | − | 0 | ) | ( | - | 7 25 | − | 2 25 | ) | ( | 20 100 | − | 19 100 | ) |
20 100 | − | x | = | ( | - | 7 25 | − | 0 | ) | ( | - | 7 25 | − | 2 25 | ) | ( | 20 100 | − | 19 100 | ) |
20 100 | − | x | = | - | 7 25 | ( | - | 7 25 | − | 2 25 | ) | ( | 20 100 | − | 19 100 | ) | − | 0 | ( | - | 7 25 | − | 2 25 | ) | ( | 20 100 | − | 19 100 | ) |
20 100 | − | x | = | 7 25 | × | 7 25 | ( | 20 100 | − | 19 100 | ) | + | 7 25 | × | 2 25 | ( | 20 100 | − | 19 100 | ) | − | 0 | ( | - | 7 25 | − | 2 25 | ) | ( | 20 100 | − | 19 100 | ) |
20 100 | − | x | = | 49 625 | ( | 20 100 | − | 19 100 | ) | + | 14 625 | ( | 20 100 | − | 19 100 | ) | − | 0 | ( | - | 7 25 | − | 2 25 | ) | ( | 20 100 | − | 19 100 | ) |
20 100 | − | x | = | 49 625 | × | 20 100 | − | 49 625 | × | 19 100 | + | 14 625 | ( | 20 100 | − | 19 100 | ) |
20 100 | − | x | = | 49 3125 | − | 931 62500 | + | 14 625 | ( | 20 100 | − | 19 100 | ) |
20 100 | − | x | = | 49 62500 | + | 14 625 | ( | 20 100 | − | 19 100 | ) |
20 100 | − | x | = | 49 62500 | + | 14 625 | × | 20 100 | − | 14 625 | × | 19 100 |
20 100 | − | x | = | 49 62500 | + | 14 3125 | − | 133 31250 |
20 100 | − | x | = | 63 62500 |
- | x | = | 63 62500 | − | 20 100 |
- | x | = | - | 12437 62500 |
12437 62500 | = | x |
x | = | 12437 62500 |