| ( | 1 10 | − | x | ) | ÷ | ( | x | ( | 1 2 | − | 2 | ( | 1 10 | − | x | ) | ) | ) | = | 1620000000000 |
| 方程两边同时乘以: | ( | x | ( | 1 2 | − | 2 | ( | 1 10 | − | x | ) | ) | ) |
| ( | 1 10 | − | x | ) | = | 1620000000000 | ( | x | ( | 1 2 | − | 2 | ( | 1 10 | − | x | ) | ) | ) |
1 10 | − | x | = | 1620000000000 | ( | x | ( | 1 2 | − | 2 | ( | 1 10 | − | x | ) | ) | ) |
1 10 | − | x | = | 1620000000000 | x | ( | 1 2 | − | 2 | ( | 1 10 | − | x | ) | ) |
1 10 | − | x | = | 1620000000000 | x | × | 1 2 | − | 1620000000000 | x | × | 2 | ( | 1 10 | − | x | ) |