| ( | 1 20 | − | 2 | x | ) | ÷ | ( | - | 12 | x | + | 1 20 | ) | = | 3563852321 500000000 |
| 方程两边同时乘以: | ( | - | 12 | x | + | 1 20 | ) |
| ( | 1 20 | − | 2 | x | ) | = | 3563852321 500000000 | ( | - | 12 | x | + | 1 20 | ) |
1 20 | − | 2 | x | = | 3563852321 500000000 | ( | - | 12 | x | + | 1 20 | ) |
1 20 | − | 2 | x | = | - | 3563852321 500000000 | × | 12 | x | + | 3563852321 500000000 | × | 1 20 |