| 4 | x | ÷ | 16 | = | ( | 5 | x | ÷ | 25 | + | 1 | + | 7 | x | ÷ | 49 | − | 4 | ) | ÷ | 2 |
| 方程左边 = | 1 4 | x |
1 4 | x | = | ( | 5 | x | ÷ | 25 | + | 1 | + | 7 | x | ÷ | 49 | − | 4 | ) | ÷ | 2 |
| 方程右边 = | 5 | x | ÷ | 25 | × | 1 2 | + | 1 | × | 1 2 | + | 7 | x | ÷ | 49 | × | 1 2 | − | 4 | × | 1 2 |
| = | 1 10 | x | + | 1 2 | + | 1 14 | x | − | 2 |
| = | 6 35 | x | − | 3 2 |
1 4 | x | = | 6 35 | x | − | 3 2 |
1 4 | x | − | 6 35 | x | = | - | 3 2 |
11 140 | x | = | - | 3 2 |
| x | = | - | 3 2 | ÷ | 11 140 |
| = | - | 3 2 | × | 140 11 |
| = | - | 3 | × | 70 11 |
| x | = | - | 210 11 |
| x | = | - 19.090909 |