| ( | 50000 | ( | 1 | + | 1193 10000 | ) | + | y | ) | × | 12 100 | = | 50000 | × | 1193 10000 | + | 3000 |
| 方程左边 = | 50000 | ( | 1 | + | 1193 10000 | ) | × | 12 100 | + | y | × | 12 100 |
| = | 6000 | ( | 1 | + | 1193 10000 | ) | + | y | × | 12 100 |
| = | 6000 | × | 1 | + | 6000 | × | 1193 10000 | + | 12 100 | y |
| = | 6000 | + | 3579 5 | + | 12 100 | y |
| = | 33579 5 | + | 12 100 | y |
33579 5 | + | 12 100 | y | = | 50000 | × | 1193 10000 | + | 3000 |
| 方程右边 = | 5965 | + | 3000 |
| = | 8965 |
33579 5 | + | 12 100 | y | = | 8965 |
12 100 | y | = | 8965 | − | 33579 5 |
12 100 | y | = | 11246 5 |
| y | = | 11246 5 | ÷ | 12 100 |
| = | 11246 5 | × | 100 12 |
| = | 5623 | × | 20 6 |
| y | = | 112460 6 |
| y | = | 56230 3 |
| y | = | 18743.333333 |