| ( | 50000 | ( | 1 | + | 1 100000 | ) | + | y | ) | × | 10 100 | = | 50000 | × | 1 100000 | + | 1000 |
| 方程左边 = | 50000 | ( | 1 | + | 1 100000 | ) | × | 10 100 | + | y | × | 10 100 |
| = | 5000 | ( | 1 | + | 1 100000 | ) | + | y | × | 10 100 |
| = | 5000 | × | 1 | + | 5000 | × | 1 100000 | + | 10 100 | y |
| = | 5000 | + | 1 20 | + | 10 100 | y |
| = | 100001 20 | + | 10 100 | y |
100001 20 | + | 10 100 | y | = | 50000 | × | 1 100000 | + | 1000 |
| 方程右边 = | 1 2 | + | 1000 |
| = | 2001 2 |
100001 20 | + | 10 100 | y | = | 2001 2 |
10 100 | y | = | 2001 2 | − | 100001 20 |
10 100 | y | = | - | 79991 20 |
| y | = | - | 79991 20 | ÷ | 10 100 |
| = | - | 79991 20 | × | 100 10 |
| = | - | 79991 | × | 5 10 |
| y | = | - | 399955 10 |
| y | = | - | 79991 2 |
| y | = | - 39995.5 |