| ( | ( | w | − | 500 | ) | ( | 1 | − | 25 100 | ) | ) | ÷ | 3000 | = | ( | ( | w | − | 1000 | × | 10 100 | ) | ( | 1 | − | 25 100 | ) | ) |
| 方程左边 = | ( | w | − | 500 | ) | ( | 1 | − | 25 100 | ) | × | 1 3000 |
| = | w | ( | 1 | − | 25 100 | ) | × | 1 3000 | − | 500 | ( | 1 | − | 25 100 | ) | × | 1 3000 |
| = | w | ( | 1 | − | 25 100 | ) | × | 1 3000 | − | 1 6 | ( | 1 | − | 25 100 | ) |
| = | w | × | 1 | × | 1 3000 | − | w | × | 25 100 | × | 1 3000 | − | 1 6 | ( | 1 | − | 25 100 | ) |
| = | w | × | 1 3000 | − | w | × | 1 12000 | − | 1 6 | ( | 1 | − | 25 100 | ) |
| = | 1 4000 | w | − | 1 6 | ( | 1 | − | 25 100 | ) |
| = | 1 4000 | w | − | 1 6 | × | 1 | + | 1 6 | × | 25 100 |
| = | 1 4000 | w | − | 1 6 | + | 1 24 |
| = | 1 4000 | w | − | 1 8 |
1 4000 | w | − | 1 8 | = | ( | ( | w | − | 1000 | × | 10 100 | ) | ( | 1 | − | 25 100 | ) | ) |
| 方程右边 = | ( | w | − | 1000 | × | 10 100 | ) | ( | 1 | − | 25 100 | ) |
| = | w | ( | 1 | − | 25 100 | ) | − | 1000 | × | 10 100 | ( | 1 | − | 25 100 | ) |
| = | w | ( | 1 | − | 25 100 | ) | − | 100 | ( | 1 | − | 25 100 | ) |
| = | w | × | 1 | − | w | × | 25 100 | − | 100 | ( | 1 | − | 25 100 | ) |
| = | 3 4 | w | − | 100 | ( | 1 | − | 25 100 | ) |
| = | 3 4 | w | − | 100 | × | 1 | + | 100 | × | 25 100 |
| = | 3 4 | w | − | 100 | + | 25 |
| = | 3 4 | w | − | 75 |
1 4000 | w | − | 1 8 | = | 3 4 | w | − | 75 |
1 4000 | w | − | 3 4 | w | = | - | 75 | + | 1 8 |
| - | 2999 4000 | w | = | - | 75 | + | 1 8 |
| - | 2999 4000 | w | = | - | 599 8 |
599 8 | = | 2999 4000 | w |
2999 4000 | w | = | 599 8 |
| w | = | 599 8 | ÷ | 2999 4000 |
| = | 599 8 | × | 4000 2999 |
| = | 599 | × | 500 2999 |
| w | = | 299500 2999 |
| w | = | 99.866622 |