| ( | 3 | x | + | 7 | ) | ÷ | 2 | = | ( | 6 | x | − | 7 | ) | ÷ | 10 |
| 方程左边 = | 3 | x | × | 1 2 | + | 7 | × | 1 2 |
| = | 3 2 | x | + | 7 2 |
3 2 | x | + | 7 2 | = | ( | 6 | x | − | 7 | ) | ÷ | 10 |
| 方程右边 = | 6 | x | × | 1 10 | − | 7 | × | 1 10 |
| = | 3 5 | x | − | 7 10 |
3 2 | x | + | 7 2 | = | 3 5 | x | − | 7 10 |
3 2 | x | − | 3 5 | x | = | - | 7 10 | − | 7 2 |
9 10 | x | = | - | 7 10 | − | 7 2 |
9 10 | x | = | - | 21 5 |
| x | = | - | 21 5 | ÷ | 9 10 |
| = | - | 21 5 | × | 10 9 |
| = | - | 7 | × | 2 3 |
| x | = | - | 14 3 |
| x | = | - 4.666667 |