| ( | 50000 | × | 1 | + | y | ) | × | 12 100 | = | 50000 | × | 1 | + | 1000 |
| 方程左边 = | 50000 | × | 1 | × | 12 100 | + | y | × | 12 100 |
| = | 6000 | + | y | × | 12 100 |
| 6000 | + | 12 100 | y | = | 50000 | × | 1 | + | 1000 |
| 方程右边 = | 50000 | + | 1000 |
| = | 51000 |
| 6000 | + | 12 100 | y | = | 51000 |
12 100 | y | = | 51000 | − | 6000 |
12 100 | y | = | 45000 |
| y | = | 45000 | ÷ | 12 100 |
| = | 45000 | × | 100 12 |
| = | 3750 | × | 100 |
| y | = | 375000 |