( | 1 | + | m | ÷ | 2 100 | ) | ( | 1 | + | m% | ) | = | 660 |
方程左边 = | 1 | ( | 1 | + | m% | ) | + | m | ÷ | 2 100 | × | ( | 1 | + | m% | ) |
= | 1 | × | 1 | + | 1 | × | m% | + | m | × | 100 2 | ( | 1 | + | m% | ) |
= | 1 | + | 1 100 | m | + | m | × | 100 2 | ( | 1 | + | m% | ) |
= | 1 | + | 1 100 | m | + | m | × | 100 2 | × | 1 | + | m | × | 100 2 | × | m% |
= | 1 | + | 1 100 | m | + | m | × | 50 | + | m | × | 1 2 | m |
= | 1 | + | 5001 100 | m | + | m | × | 1 2 | m |
1 | + | 5001 100 | m | + | m | × | 1 2 | m | = | 660 |