13 20 | x | − | x | ÷ | ( | x | − | 5763 20 | ) | − | 74919 200 | = | 0 |
| 方程两边同时乘以: | ( | x | − | 5763 20 | ) |
13 20 | x | ( | x | − | 5763 20 | ) | − | x | − | 74919 200 | ( | x | − | 5763 20 | ) | = | 0 |
13 20 | x | x | − | 13 20 | x | × | 5763 20 | − | x | − | 74919 200 | ( | x | − | 5763 20 | ) | = | 0 |
13 20 | x | x | − | 74919 400 | x | − | x | − | 74919 200 | ( | x | − | 5763 20 | ) | = | 0 |
13 20 | x | x | − | 75319 400 | x | − | 74919 200 | ( | x | − | 5763 20 | ) | = | 0 |
13 20 | x | x | − | 75319 400 | x | − | 74919 200 | x | + | 74919 200 | × | 5763 20 | = | 0 |
13 20 | x | x | − | 75319 400 | x | − | 74919 200 | x | + | 431758197 4000 | = | 0 |
13 20 | x | x | − | 225157 400 | x | + | 431758197 4000 | = | 0 |