| 25 | ÷ | ( | ( | a | + | 8 | ) | ( | a | + | 8 | ) | ) | = | 499849 1000000 |
| 方程两边同时乘以: | ( | ( | a | + | 8 | ) | ( | a | + | 8 | ) | ) |
| 25 | = | 499849 1000000 | ( | ( | a | + | 8 | ) | ( | a | + | 8 | ) | ) |
| 25 | = | 499849 1000000 | ( | a | + | 8 | ) | ( | a | + | 8 | ) |
| 25 | = | 499849 1000000 | a | ( | a | + | 8 | ) | + | 499849 1000000 | × | 8 | ( | a | + | 8 | ) |
| 25 | = | 499849 1000000 | a | ( | a | + | 8 | ) | + | 499849 125000 | ( | a | + | 8 | ) |
| 25 | = | 499849 1000000 | a | a | + | 499849 1000000 | a | × | 8 | + | 499849 125000 | ( | a | + | 8 | ) |
| 25 | = | 499849 1000000 | a | a | + | 499849 125000 | a | + | 499849 125000 | ( | a | + | 8 | ) |
| 25 | = | 499849 1000000 | a | a | + | 499849 125000 | a | + | 499849 125000 | a | + | 499849 125000 | × | 8 |
| 25 | = | 499849 1000000 | a | a | + | 499849 125000 | a | + | 499849 125000 | a | + | 499849 15625 |
| 25 | = | 499849 1000000 | a | a | + | 499849 62500 | a | + | 499849 15625 |