| 5 | ÷ | n | + | 5 | × | 4 | ÷ | n | + | 4 | = | 2 | ÷ | 11 |
| 方程两边同时乘以: | n |
| 5 | + | 5 | × | 4 | ÷ | 1 | × | 1 | + | 4 | n | = | 2 | ÷ | 11 | × | n |
| 4 | n | − | 2 | ÷ | 11 | × | n | = | - | 5 | − | 5 | × | 4 | ÷ | 1 | × | 1 |
| 4 | n | − | 2 11 | n | = | - | 5 | − | 5 | × | 4 | ÷ | 1 | × | 1 |
| 4 | n | − | 2 11 | n | = | - | 5 | − | 20 |
42 11 | n | = | - | 5 | − | 20 |
42 11 | n | = | - | 25 |
| n | = | - | 25 | ÷ | 42 11 |
| = | - | 25 | × | 11 42 |
| n | = | - | 275 42 |
| n | = | - 6.547619 |