| ( | 49983 10 | − | y | ) | ÷ | y | = | 19 1000 |
| 方程两边同时乘以: | y |
| ( | 49983 10 | − | y | ) | = | 19 1000 | y |
49983 10 | − | y | = | 19 1000 | y |
| - | y | − | 19 1000 | y | = | - | 49983 10 |
| - | 1019 1000 | y | = | - | 49983 10 |
49983 10 | = | 1019 1000 | y |
1019 1000 | y | = | 49983 10 |
| y | = | 49983 10 | ÷ | 1019 1000 |
| = | 49983 10 | × | 1000 1019 |
| = | 49983 | × | 100 1019 |
| y | = | 4998300 1019 |
| y | = | 4905.103042 |