| 4 | ÷ | 5 | × | x | = | 6 | ÷ | 7 | × | ( | x | + | 22 | ) |
| 方程左边 = | 4 5 | x |
4 5 | x | = | 6 | ÷ | 7 | × | ( | x | + | 22 | ) |
| 方程右边 = | 6 7 | ( | x | + | 22 | ) |
4 5 | x | = | 6 7 | ( | x | + | 22 | ) |
| 方程右边 = | 6 7 | x | + | 6 7 | × | 22 |
| = | 6 7 | x | + | 132 7 |
4 5 | x | = | 6 7 | x | + | 132 7 |
4 5 | x | − | 6 7 | x | = | 132 7 |
| - | 2 35 | x | = | 132 7 |
| - | 132 7 | = | 2 35 | x |
2 35 | x | = | - | 132 7 |
| x | = | - | 132 7 | ÷ | 2 35 |
| = | - | 132 7 | × | 35 2 |
| = | - | 66 | × | 5 |
| x | = | - | 330 |