| ( | n | − | 8 | ) | ÷ | ( | n | + | 1 | ) | = | 11 25 |
| 方程两边同时乘以: | ( | n | + | 1 | ) |
| ( | n | − | 8 | ) | = | 11 25 | ( | n | + | 1 | ) |
| n | − | 8 | = | 11 25 | ( | n | + | 1 | ) |
| n | − | 8 | = | 11 25 | n | + | 11 25 | × | 1 |
| n | − | 8 | = | 11 25 | n | + | 11 25 |
| n | − | 11 25 | n | = | 11 25 | + | 8 |
14 25 | n | = | 11 25 | + | 8 |
14 25 | n | = | 211 25 |
| n | = | 211 25 | ÷ | 14 25 |
| = | 211 25 | × | 25 14 |
| = | 211 | × | 1 14 |
| n | = | 211 14 |
| n | = | 15.071429 |