| ( | x | − | 50 | ) | ÷ | ( | 3 | x | + | 50 | ) | = | 2 | ÷ | 8 |
| 方程两边同时乘以: | ( | 3 | x | + | 50 | ) |
| ( | x | − | 50 | ) | = | 2 | ÷ | 8 | × | ( | 3 | x | + | 50 | ) |
| x | − | 50 | = | 2 | ÷ | 8 | × | ( | 3 | x | + | 50 | ) |
| x | − | 50 | = | 2 | ÷ | 8 | × | 3 | x | + | 2 | ÷ | 8 | × | 50 |
| x | − | 50 | = | 3 4 | x | + | 25 2 |
| x | − | 3 4 | x | = | 25 2 | + | 50 |
1 4 | x | = | 25 2 | + | 50 |
1 4 | x | = | 125 2 |
| x | = | 125 2 | ÷ | 1 4 |
| = | 125 2 | × | 4 |
| = | 125 | × | 2 |
| x | = | 250 |