| - | 41800 | + | 30000 | + | w | − | 4500 | − | w | × | 10 100 | ÷ | 4 | = | 3200 |
| Left side of the equation = | - | 41800 | + | 30000 | + | w | − | 4500 | − | w | × | 1 40 |
| = | - | 16300 | + | 39 40 | w |
| - | 16300 | + | 39 40 | w | = | 3200 |
39 40 | w | = | 3200 | + | 16300 |
39 40 | w | = | 19500 |
| w | = | 19500 | ÷ | 39 40 |
| = | 19500 | × | 40 39 |
| = | 500 | × | 40 |
| w | = | 20000 |