18 100 | ÷ | w | + | 13 100 | ÷ | ( | 1 | − | w | ) | = | 16 100 |
| 方程两边同时乘以: | w |
18 100 | + | 13 100 | ÷ | ( | 1 | − | w | ) | × | w | = | 16 100 | w |
| 方程两边同时乘以: | ( | 1 | − | w | ) |
18 100 | ( | 1 | − | w | ) | + | 13 100 | w | = | 16 100 | w | ( | 1 | − | w | ) |
18 100 | × | 1 | − | 18 100 | w | + | 13 100 | w | = | 16 100 | w | ( | 1 | − | w | ) |
18 100 | × | 1 | − | 18 100 | w | + | 13 100 | w | = | 16 100 | w | × | 1 | − | 16 100 | w | w |
9 50 | − | 18 100 | w | + | 13 100 | w | = | 4 25 | w | − | 16 100 | w | w |
9 50 | − | 1 20 | w | = | 4 25 | w | − | 16 100 | w | w |