| ( | 200 | ÷ | x | − | 3 4 | ) | ( | x | + | 10 | ) | = | 150 |
| 200 | ÷ | x | × | ( | x | + | 10 | ) | − | 3 4 | ( | x | + | 10 | ) | = | 150 |
| 方程两边同时乘以: | x |
| 200 | ( | x | + | 10 | ) | − | 3 4 | ( | x | + | 10 | ) | x | = | 150 | x |
| 200 | x | + | 200 | × | 10 | − | 3 4 | ( | x | + | 10 | ) | x | = | 150 | x |
| 200 | x | + | 2000 | − | 3 4 | ( | x | + | 10 | ) | x | = | 150 | x |
| 200 | x | + | 2000 | − | 3 4 | x | x | − | 3 4 | × | 10 | x | = | 150 | x |
| 200 | x | + | 2000 | − | 3 4 | x | x | − | 15 2 | x | = | 150 | x |
385 2 | x | + | 2000 | − | 3 4 | x | x | = | 150 | x |