| ( | 3 | x | − | 3 | ) | = | ( | 2 | x | + | 13 | ) | ÷ | 3 | × | 2 |
| 方程左边 = | 3 | x | − | 3 |
| 3 | x | − | 3 | = | ( | 2 | x | + | 13 | ) | ÷ | 3 | × | 2 |
| 方程右边 = | ( | 2 | x | + | 13 | ) | × | 2 3 |
| 3 | x | − | 3 | = | ( | 2 | x | + | 13 | ) | × | 2 3 |
| 方程右边 = | 2 | x | × | 2 3 | + | 13 | × | 2 3 |
| = | 4 3 | x | + | 26 3 |
| 3 | x | − | 3 | = | 4 3 | x | + | 26 3 |
| 3 | x | − | 4 3 | x | = | 26 3 | + | 3 |
5 3 | x | = | 26 3 | + | 3 |
5 3 | x | = | 35 3 |
| x | = | 35 3 | ÷ | 5 3 |
| = | 35 3 | × | 3 5 |
| = | 7 | × | 1 |
| x | = | 7 |