3 10 | ÷ | ( | 2000 | − | p | ÷ | 2000 | ) | = | - | 2 |
方程两边同时乘以: | ( | 2000 | − | p | ÷ | 2000 | ) |
3 10 | = | - | 2 | ( | 2000 | − | p | ÷ | 2000 | ) |
3 10 | = | - | 2 | × | 2000 | + | 2 | p | ÷ | 2000 |
3 10 | = | - | 4000 | + | 1 1000 | p |
- | 1 1000 | p | = | - | 4000 | − | 3 10 |
- | 1 1000 | p | = | - | 40003 10 |
40003 10 | = | 1 1000 | p |
1 1000 | p | = | 40003 10 |
p | = | 40003 10 | ÷ | 1 1000 |
= | 40003 10 | × | 1000 |
= | 40003 | × | 100 |
p | = | 4000300 |