| ( | x | + | 17 | ) | ÷ | 5 | = | 2 | − | ( | 2 | x | − | 7 | ) | ÷ | 4 |
| 方程左边 = | x | × | 1 5 | + | 17 | × | 1 5 |
| = | x | × | 1 5 | + | 17 5 |
1 5 | x | + | 17 5 | = | 2 | − | ( | 2 | x | − | 7 | ) | ÷ | 4 |
| 方程右边 = | 2 | − | 2 | x | × | 1 4 | + | 7 | × | 1 4 |
| = | 2 | − | 1 2 | x | + | 7 4 |
| = | 15 4 | − | 1 2 | x |
1 5 | x | + | 17 5 | = | 15 4 | − | 1 2 | x |
1 5 | x | + | 1 2 | x | = | 15 4 | − | 17 5 |
7 10 | x | = | 15 4 | − | 17 5 |
7 10 | x | = | 7 20 |
| x | = | 7 20 | ÷ | 7 10 |
| = | 7 20 | × | 10 7 |
| = | 1 2 | × | 1 |
| x | = | 1 2 |
| x | = | 0.5 |