| 4 | x | + | 4 | ÷ | 13 | = | 6 | x | + | 4 | ÷ | 5 |
| 方程左边 = | 4 | x | + | 4 13 |
| 4 | x | + | 4 13 | = | 6 | x | + | 4 | ÷ | 5 |
| 方程右边 = | 6 | x | + | 4 5 |
| 4 | x | + | 4 13 | = | 6 | x | + | 4 5 |
| 4 | x | − | 6 | x | = | 4 5 | − | 4 13 |
| - | 2 | x | = | 4 5 | − | 4 13 |
| - | 2 | x | = | 32 65 |
| - | 32 65 | = | 2 | x |
| 2 | x | = | - | 32 65 |
| x | = | - | 32 65 | ÷ | 2 |
| = | - | 32 65 | × | 1 2 |
| = | - | 16 65 | × | 1 |
| x | = | - | 16 65 |
| x | = | - 0.246154 |