| - | 2 | = | ( | ( | 10000 | − | 8000 | ) | ÷ | p | × | 2 | − | 100 | ) | ( | ( | 100 | + | p | × | 2 | ) | ÷ | ( | 8000 | + | 10000 | ) | ) |
| - | 2 | = | ( | 10000 | − | 8000 | ) | ÷ | p | × | 2 | ( | ( | 100 | + | p | × | 2 | ) | ÷ | ( | 8000 | + | 10000 | ) | ) | − | 100 | ( | ( | 100 | + | p | × | 2 | ) | ÷ | ( | 8000 | + | 10000 | ) | ) |
| 方程两边同时乘以: | p |
| - | 2 | p | = | ( | 10000 | − | 8000 | ) | × | 2 | ( | ( | 100 | + | p | × | 2 | ) | ÷ | ( | 8000 | + | 10000 | ) | ) | − | 100 | ( | ( | 100 | + | p | × | 2 | ) | ÷ | ( | 8000 | + | 10000 | ) | ) | p |
| - | 2 | p | = | 10000 | × | 2 | ( | ( | 100 | + | p | × | 2 | ) | ÷ | ( | 8000 | + | 10000 | ) | ) | − | 8000 | × | 2 | ( | ( | 100 | + | p | × | 2 | ) | ÷ | ( | 8000 | + | 10000 | ) | ) | − | 100 | ( | ( | 100 | + | p | × | 2 | ) | ÷ | ( | 8000 | + | 10000 | ) | ) | p |
| - | 2 | p | = | 20000 | ( | ( | 100 | + | p | × | 2 | ) | ÷ | ( | 8000 | + | 10000 | ) | ) | − | 16000 | ( | ( | 100 | + | p | × | 2 | ) | ÷ | ( | 8000 | + | 10000 | ) | ) | − | 100 | ( | ( | 100 | + | p | × | 2 | ) | ÷ | ( | 8000 | + | 10000 | ) | ) | p |
| - | 2 | p | = | 20000 | ( | 100 | + | p | × | 2 | ) | ÷ | ( | 8000 | + | 10000 | ) | − | 16000 | ( | ( | 100 | + | p | × | 2 | ) | ÷ | ( | 8000 | + | 10000 | ) | ) | − | 100 | ( | ( | 100 | + | p | × | 2 | ) | ÷ | ( | 8000 | + | 10000 | ) | ) | p |
| 方程两边同时乘以: | ( | 8000 | + | 10000 | ) |
| - | 2 | p | ( | 8000 | + | 10000 | ) | = | 20000 | ( | 100 | + | p | × | 2 | ) | − | 16000 | ( | ( | 100 | + | p | × | 2 | ) | ÷ | ( | 8000 | + | 10000 | ) | ) | ( | 8000 | + | 10000 | ) | − | 100 | ( | ( | 100 | + | p | × | 2 | ) | ÷ | ( | 8000 | + | 10000 | ) | ) | p | ( | 8000 | + | 10000 | ) |
| - | 2 | p | × | 8000 | − | 2 | p | × | 10000 | = | 20000 | ( | 100 | + | p | × | 2 | ) | − | 16000 | ( | ( | 100 | + | p | × | 2 | ) | ÷ | ( | 8000 | + | 10000 | ) | ) | ( | 8000 | + | 10000 | ) | − | 100 | ( | ( | 100 | + | p | × | 2 | ) | ÷ | ( | 8000 | + | 10000 | ) | ) | p | ( | 8000 | + | 10000 | ) |
| - | 2 | p | × | 8000 | − | 2 | p | × | 10000 | = | 20000 | × | 100 | + | 20000 | p | × | 2 | − | 16000 | ( | ( | 100 | + | p | × | 2 | ) | ÷ | ( | 8000 | + | 10000 | ) | ) | ( | 8000 | + | 10000 | ) | − | 100 | ( | ( | 100 | + | p | × | 2 | ) | ÷ | ( | 8000 | + | 10000 | ) | ) | p | ( | 8000 | + | 10000 | ) |
| - | 16000 | p | − | 20000 | p | = | 2000000 | + | 40000 | p | − | 16000 | ( | ( | 100 | + | p | × | 2 | ) | ÷ | ( | 8000 | + | 10000 | ) | ) | ( | 8000 | + | 10000 | ) | − | 100 | ( | ( | 100 | + | p | × | 2 | ) | ÷ | ( | 8000 | + | 10000 | ) | ) | p | ( | 8000 | + | 10000 | ) |
| - | 36000 | p | = | 2000000 | + | 40000 | p | − | 16000 | ( | ( | 100 | + | p | × | 2 | ) | ÷ | ( | 8000 | + | 10000 | ) | ) | ( | 8000 | + | 10000 | ) | − | 100 | ( | ( | 100 | + | p | × | 2 | ) | ÷ | ( | 8000 | + | 10000 | ) | ) | p | ( | 8000 | + | 10000 | ) |
| - | 36000 | p | = | 2000000 | + | 40000 | p | − | 16000 | ( | 100 | + | p | × | 2 | ) | ÷ | ( | 8000 | + | 10000 | ) | × | ( | 8000 | + | 10000 | ) | − | 100 | ( | ( | 100 | + | p | × | 2 | ) | ÷ | ( | 8000 | + | 10000 | ) | ) | p | ( | 8000 | + | 10000 | ) |
| 方程两边同时乘以: | ( | 8000 | + | 10000 | ) |
| - | 36000 | p | ( | 8000 | + | 10000 | ) | = | 2000000 | ( | 8000 | + | 10000 | ) | + | 40000 | p | ( | 8000 | + | 10000 | ) | − | 16000 | ( | 100 | + | p | × | 2 | ) | ( | 8000 | + | 10000 | ) | − | 100 | ( | ( | 100 | + | p | × | 2 | ) | ÷ | ( | 8000 | + | 10000 | ) | ) | p | ( | 8000 | + | 10000 | ) |
| - | 36000 | p | × | 8000 | − | 36000 | p | × | 10000 | = | 2000000 | ( | 8000 | + | 10000 | ) | + | 40000 | p | ( | 8000 | + | 10000 | ) | − | 16000 | ( | 100 | + | p | × | 2 | ) | ( | 8000 | + | 10000 | ) | − | 100 | ( | ( | 100 | + | p | × | 2 | ) | ÷ | ( | 8000 | + | 10000 | ) | ) | p | ( | 8000 | + | 10000 | ) |
| - | 36000 | p | × | 8000 | − | 36000 | p | × | 10000 | = | 2000000 | × | 8000 | + | 2000000 | × | 10000 | + | 40000 | p | ( | 8000 | + | 10000 | ) | − | 16000 | ( | 100 | + | p | × | 2 | ) | ( | 8000 | + | 10000 | ) | − | 100 | ( | ( | 100 | + | p | × | 2 | ) | ÷ | ( | 8000 | + | 10000 | ) | ) |