| ( | ( | 13963 50 | ÷ | x | ) | ÷ | 1970 | ) | + | ( | x | ÷ | 1000 | ) | = | 9 10 |
| ( | 13963 50 | ÷ | x | ) | ÷ | 1970 | + | ( | x | ÷ | 1000 | ) | = | 9 10 |
13963 50 | ÷ | x | × | 1 1970 | + | ( | x | ÷ | 1000 | ) | = | 9 10 |
13963 98500 | ÷ | x | + | ( | x | ÷ | 1000 | ) | = | 9 10 |
| 方程两边同时乘以: | x |
13963 98500 | + | ( | x | ÷ | 1000 | ) | x | = | 9 10 | x |
13963 98500 | + | x | ÷ | 1000 | × | x | = | 9 10 | x |