| 7 | ÷ | 4 | × | x | − | 1 4 | = | 28 | ÷ | 3 | × | x | + | 1 |
| 方程左边 = | 7 4 | x | − | 1 4 |
7 4 | x | − | 1 4 | = | 28 | ÷ | 3 | × | x | + | 1 |
| 方程右边 = | 28 3 | x | + | 1 |
7 4 | x | − | 1 4 | = | 28 3 | x | + | 1 |
7 4 | x | − | 28 3 | x | = | 1 | + | 1 4 |
| - | 91 12 | x | = | 1 | + | 1 4 |
| - | 91 12 | x | = | 5 4 |
| - | 5 4 | = | 91 12 | x |
91 12 | x | = | - | 5 4 |
| x | = | - | 5 4 | ÷ | 91 12 |
| = | - | 5 4 | × | 12 91 |
| = | - | 5 | × | 3 91 |
| x | = | - | 15 91 |
| x | = | - 0.164835 |