627143 1000000 | = | ( | 19 20 | − | x | ) | ÷ | ( | 19 20 | − | 49 50 | ) |
| 方程两边同时乘以: | ( | 19 20 | − | 49 50 | ) |
627143 1000000 | ( | 19 20 | − | 49 50 | ) | = | ( | 19 20 | − | x | ) |
627143 1000000 | × | 19 20 | − | 627143 1000000 | × | 49 50 | = | ( | 19 20 | − | x | ) |
627143 1000000 | × | 19 20 | − | 627143 1000000 | × | 49 50 | = | 19 20 | − | x |
11915717 20000000 | − | 30730007 50000000 | = | 19 20 | − | x |