| 54 | ÷ | x | + | 3300 | ÷ | ( | 350 | − | x | ) | = | 350 |
| 方程两边同时乘以: | x |
| 54 | + | 3300 | ÷ | ( | 350 | − | x | ) | × | x | = | 350 | x |
| 方程两边同时乘以: | ( | 350 | − | x | ) |
| 54 | ( | 350 | − | x | ) | + | 3300 | x | = | 350 | x | ( | 350 | − | x | ) |
| 54 | × | 350 | − | 54 | x | + | 3300 | x | = | 350 | x | ( | 350 | − | x | ) |
| 54 | × | 350 | − | 54 | x | + | 3300 | x | = | 350 | x | × | 350 | − | 350 | x | x |
| 18900 | − | 54 | x | + | 3300 | x | = | 122500 | x | − | 350 | x | x |
| 18900 | + | 3246 | x | = | 122500 | x | − | 350 | x | x |