251 50 | = | ( | 5 2 | u | ) | ÷ | ( | u | − | 5 2 | ) |
| 方程两边同时乘以: | ( | u | − | 5 2 | ) |
251 50 | ( | u | − | 5 2 | ) | = | ( | 5 2 | u | ) |
251 50 | u | − | 251 50 | × | 5 2 | = | ( | 5 2 | u | ) |
251 50 | u | − | 251 50 | × | 5 2 | = | 5 2 | u |
251 50 | u | − | 251 20 | = | 5 2 | u |
251 50 | u | − | 5 2 | u | = | 251 20 |
63 25 | u | = | 251 20 |
| u | = | 251 20 | ÷ | 63 25 |
| = | 251 20 | × | 25 63 |
| = | 251 4 | × | 5 63 |
| u | = | 1255 252 |
| u | = | 4.980159 |