| 1 | ÷ | ( | d | + | 409 10000 | ) | = | 1 | ÷ | d | + | 1 | ÷ | ( | d | + | 1 | ) | + | 1 | ÷ | ( | d | + | 3 | ) | + | 1 | ÷ | ( | d | + | 7 2500 | ) |
| 方程两边同时乘以: | ( | d | + | 409 10000 | ) | , | d |
| 1 | d | = | 1 | ( | d | + | 409 10000 | ) | + | 1 | ÷ | ( | d | + | 1 | ) | × | ( | d | + | 409 10000 | ) | d | + | 1 | ÷ | ( | d | + | 3 | ) | × | ( | d | + | 409 10000 | ) | d | + | 1 | ÷ | ( | d | + | 7 2500 | ) |
| 1 | d | = | 1 | d | + | 1 | × | 409 10000 | + | 1 | ÷ | ( | d | + | 1 | ) | × | ( | d | + | 409 10000 | ) | d | + | 1 | ÷ | ( | d | + | 3 | ) | × | ( | d | + | 409 10000 | ) | d |
| 1 | d | = | 1 | d | + | 409 10000 | + | 1 | ÷ | ( | d | + | 1 | ) | × | ( | d | + | 409 10000 | ) | d | + | 1 | ÷ | ( | d | + | 3 | ) | × | ( | d | + | 409 10000 | ) | d | + | 1 |
| 方程两边同时乘以: | ( | d | + | 1 | ) |
| 1 | d | ( | d | + | 1 | ) | = | 1 | d | ( | d | + | 1 | ) | + | 409 10000 | ( | d | + | 1 | ) | + | 1 | ( | d | + | 409 10000 | ) | d | + | 1 | ÷ | ( | d | + | 3 | ) | × | ( | d | + | 409 10000 | ) | d |
| 1 | d | d | + | 1 | d | × | 1 | = | 1 | d | ( | d | + | 1 | ) | + | 409 10000 | ( | d | + | 1 | ) | + | 1 | ( | d | + | 409 10000 | ) | d | + | 1 | ÷ | ( | d | + | 3 | ) | × | ( | d | + | 409 10000 | ) | d |
| 1 | d | d | + | 1 | d | × | 1 | = | 1 | d | d | + | 1 | d | × | 1 | + | 409 10000 | ( | d | + | 1 | ) | + | 1 | ( | d | + | 409 10000 | ) | d | + | 1 |
| 1 | d | d | + | 1 | d | = | 1 | d | d | + | 1 | d | + | 409 10000 | ( | d | + | 1 | ) | + | 1 | ( | d | + | 409 10000 | ) | d | + | 1 | ÷ | ( | d | + | 3 | ) |
| 方程两边同时乘以: | ( | d | + | 3 | ) |
| 1 | d | d | ( | d | + | 3 | ) | + | 1 | d | ( | d | + | 3 | ) | = | 1 | d | d | ( | d | + | 3 | ) | + | 1 | d | ( | d | + | 3 | ) | + | 409 10000 | ( | d | + | 1 | ) | ( | d | + | 3 | ) | + | 1 | ( | d | + | 409 10000 | ) |
| 1 | d | d | d | + | 1 | d | d | × | 3 | + | 1 | d | ( | d | + | 3 | ) | = | 1 | d | d | ( | d | + | 3 | ) | + | 1 | d | ( | d | + | 3 | ) | + | 409 10000 | ( | d | + | 1 | ) | ( | d | + | 3 | ) | + | 1 | ( | d | + | 409 10000 | ) |
| 1 | d | d | d | + | 1 | d | d | × | 3 | + | 1 | d | ( | d | + | 3 | ) | = | 1 | d | d | d | + | 1 | d | d | × | 3 | + | 1 | d | ( | d | + | 3 | ) | + | 409 10000 |
| 1 | d | d | d | + | 3 | d | d | + | 1 | d | ( | d | + | 3 | ) | = | 1 | d | d | d | + | 3 | d | d | + | 1 | d | ( | d | + | 3 | ) | + | 409 10000 | ( | d | + | 1 | ) |
| 方程两边同时乘以: | ( | d | + | 7 2500 | ) |
| 1 | d | d | d | ( | d | + | 7 2500 | ) | + | 3 | d | d | ( | d | + | 7 2500 | ) | + | 1 | d | ( | d | + | 3 | ) | = | 1 | d | d | d | ( | d | + | 7 2500 | ) | + | 3 | d | d | ( | d | + | 7 2500 | ) | + | 1 | d | ( | d | + | 3 | ) |
| 1 | d | d | d | d | + | 1 | d | d | d | × | 7 2500 | + | 3 | d | = | 1 | d | d | d | ( | d | + | 7 2500 | ) | + | 3 | d | d | ( | d | + | 7 2500 | ) | + | 1 | d | ( | d | + | 3 | ) |
| 1 | d | d | d | d | + | 1 | d | d | d | × | 7 2500 | + | 3 | d | = | 1 | d | d | d | d | + | 1 | d | d | d | × | 7 2500 | + | 3 | d |
| 1 | d | d | d | d | + | 7 2500 | d | d | d | + | 3 | d | d | = | 1 | d | d | d | d | + | 7 2500 | d | d | d | + | 3 | d | d |
| 1 | d | d | d | d | + | 7 2500 | d | d | d | + | 3 | d | d | = | 1 | d | d | d | d | + | 7 2500 | d | d | d | + | 3 | d | d |
| 1 | d | d | d | d | + | 7 2500 | d | d | d | + | 3 | d | d | = | 1 | d | d | d | d | + | 7 2500 | d | d | d | + | 3 | d | d |
| 1 | d | d | d | d | + | 7 2500 | d | d | d | + | 3 | d | d | = | 1 | d | d | d | d | + | 7 2500 | d | d | d | + | 3 | d | d |
| 1 | d | d | d | d | + | 7 2500 | d | d | d | + | 3 | d | d | = | 1 | d | d | d | d | + | 7 2500 | d | d | d | + | 3 | d | d |
| 1 | d | d | d | d | + | 7 2500 | d | d | d | + | 3 | d | d | = | 1 | d | d | d | d | + | 7 2500 | d | d | d | + | 3 | d | d |
| 1 | d | d | d | d | + | 7 2500 | d | d | d | + | 3 | d | d | = | 1 | d | d | d | d | + | 7 2500 | d | d | d | + | 3 | d | d |