| 1 | ÷ | 7 | × | ( | x | + | 14 | ) | = | 1 | ÷ | 4 | × | ( | x | + | 20 | ) |
| 方程左边 = | 1 7 | ( | x | + | 14 | ) |
1 7 | ( | x | + | 14 | ) | = | 1 | ÷ | 4 | × | ( | x | + | 20 | ) |
| 方程左边 = | 1 7 | x | + | 1 7 | × | 14 |
| = | 1 7 | x | + | 2 |
1 7 | x | + | 2 | = | 1 | ÷ | 4 | × | ( | x | + | 20 | ) |
| 方程右边 = | 1 4 | ( | x | + | 20 | ) |
1 7 | x | + | 2 | = | 1 4 | ( | x | + | 20 | ) |
| 方程右边 = | 1 4 | x | + | 1 4 | × | 20 |
| = | 1 4 | x | + | 5 |
1 7 | x | + | 2 | = | 1 4 | x | + | 5 |
1 7 | x | − | 1 4 | x | = | 5 | − | 2 |
| - | 3 28 | x | = | 5 | − | 2 |
| - | 3 28 | x | = | 3 |
| - | 3 | = | 3 28 | x |
3 28 | x | = | - | 3 |
| x | = | - | 3 | ÷ | 3 28 |
| = | - | 3 | × | 28 3 |
| = | - | 1 | × | 28 |
| x | = | - | 28 |