| ( | 180 | ÷ | ( | x | + | 5 | ) | + | 1 | ÷ | 2 | ) | = | 180 | ÷ | x |
| 方程两边同时乘以: | x |
| ( | 180 | ÷ | ( | x | + | 5 | ) | + | 1 | ÷ | 2 | ) | x | = | 180 |
| 180 | ÷ | ( | x | + | 5 | ) | × | x | + | 1 | ÷ | 2 | × | x | = | 180 |
| 180 | ÷ | ( | x | + | 5 | ) | × | x | + | 1 2 | x | = | 180 |
| 方程两边同时乘以: | ( | x | + | 5 | ) |
| 180 | x | + | 1 2 | x | ( | x | + | 5 | ) | = | 180 | ( | x | + | 5 | ) |
| 180 | x | + | 1 2 | x | x | + | 1 2 | x | × | 5 | = | 180 | ( | x | + | 5 | ) |
| 180 | x | + | 1 2 | x | x | + | 1 2 | x | × | 5 | = | 180 | x | + | 180 | × | 5 |
| 180 | x | + | 1 2 | x | x | + | 5 2 | x | = | 180 | x | + | 900 |
365 2 | x | + | 1 2 | x | x | = | 180 | x | + | 900 |