9 2 | ÷ | x | − | 9 2 | ÷ | ( | 50 | + | x | ) | = | 3 10 |
| 方程两边同时乘以: | x |
9 2 | − | 9 2 | ÷ | ( | 50 | + | x | ) | × | x | = | 3 10 | x |
| 方程两边同时乘以: | ( | 50 | + | x | ) |
9 2 | ( | 50 | + | x | ) | − | 9 2 | x | = | 3 10 | x | ( | 50 | + | x | ) |
9 2 | × | 50 | + | 9 2 | x | − | 9 2 | x | = | 3 10 | x | ( | 50 | + | x | ) |
9 2 | × | 50 | + | 9 2 | x | − | 9 2 | x | = | 3 10 | x | × | 50 | + | 3 10 | x | x |
| 225 | + | 9 2 | x | − | 9 2 | x | = | 15 | x | + | 3 10 | x | x |
| 225 | + | 0 | x | = | 15 | x | + | 3 10 | x | x |