3 5 | = | ( | 9 10 | − | 3 4 | ) | ÷ | ( | 9 10 | − | x | ) |
| 方程两边同时乘以: | ( | 9 10 | − | x | ) |
3 5 | ( | 9 10 | − | x | ) | = | ( | 9 10 | − | 3 4 | ) |
3 5 | × | 9 10 | − | 3 5 | x | = | ( | 9 10 | − | 3 4 | ) |
3 5 | × | 9 10 | − | 3 5 | x | = | 9 10 | − | 3 4 |
27 50 | − | 3 5 | x | = | 9 10 | − | 3 4 |
27 50 | − | 3 5 | x | = | 3 20 |
| - | 3 5 | x | = | 3 20 | − | 27 50 |
| - | 3 5 | x | = | - | 39 100 |
39 100 | = | 3 5 | x |
3 5 | x | = | 39 100 |
| x | = | 39 100 | ÷ | 3 5 |
| = | 39 100 | × | 5 3 |
| = | 13 20 | × | 1 |
| x | = | 13 20 |
| x | = | 0.65 |