| 4 | x | − | 15 | ÷ | 1 2 | − | 5 | x | − | 4 5 | ÷ | 1 5 | = | 6 5 | − | x | ÷ | 1 10 | + | 3 |
| 方程左边 = | 4 | x | − | 30 | − | 5 | x | − | 4 |
| = | - | 1 | x | − | 34 |
| - | 1 | x | − | 34 | = | 6 5 | − | x | ÷ | 1 10 | + | 3 |
| 方程右边 = | 21 5 | − | 10 | x |
| - | 1 | x | − | 34 | = | 21 5 | − | 10 | x |
| - | 1 | x | + | 10 | x | = | 21 5 | + | 34 |
| 9 | x | = | 21 5 | + | 34 |
| 9 | x | = | 191 5 |
| x | = | 191 5 | ÷ | 9 |
| = | 191 5 | × | 1 9 |
| x | = | 191 45 |
| x | = | 4.244444 |