| 3600 | ÷ | x | + | 3600 | ÷ | ( | 6 5 | x | ) | = | 10 |
| 方程两边同时乘以: | x |
| 3600 | + | 3600 | ÷ | ( | 6 5 | × | 1 | ) | × | 1 | = | 10 | x |
| 方程两边同时乘以: | ( | 6 5 | × | 1 | ) |
| 3600 | ( | 6 5 | × | 1 | ) | + | 3600 | × | 1 | = | 10 | x | ( | 6 5 | × | 1 | ) |
| 3600 | × | 6 5 | × | 1 | + | 3600 | × | 1 | = | 10 | x | ( | 6 5 | × | 1 | ) |
| 3600 | × | 6 5 | × | 1 | + | 3600 | × | 1 | = | 10 | x | × | 6 5 | × | 1 |
| 4320 | + | 3600 | = | 12 | x |
| 7920 | = | 12 | x |
| - | 12 | x | = | - | 7920 |
| 7920 | = | 12 | x |
| 12 | x | = | 7920 |
| x | = | 7920 | ÷ | 12 |
| = | 7920 | × | 1 12 |
| = | 660 | × | 1 |
| x | = | 660 |