| ( | ( | 20 | + | x | ) | ÷ | 18 | ) | ÷ | ( | ( | ( | 20 | + | x | ) | ÷ | 18 | ) | + | 42 25 | ÷ | 342 | ) | = | ( | ( | 20 | − | x | ) | ÷ | 18 | ) | ÷ | ( | ( | ( | 20 | − | x | ) | ÷ | 18 | ) | + | 49 20 | ÷ | 690 | ) |
| 方程两边同时乘以: | ( | ( | ( | 20 | + | x | ) | ÷ | 18 | ) | + | 42 25 | ÷ | 342 | ) | , | ( | ( | ( | 20 | − | x | ) | ÷ | 18 | ) | + | 49 20 | ÷ | 690 | ) |
| ( | ( | 20 | + | x | ) | ÷ | 18 | ) | ( | ( | ( | 20 | − | x | ) | ÷ | 18 | ) | + | 49 20 | ÷ | 690 | ) | = | ( | ( | 20 | − | x | ) | ÷ | 18 | ) | ( | ( | ( | 20 | + | x | ) | ÷ | 18 | ) | + | 42 25 | ÷ | 342 | ) |
| ( | 20 | + | x | ) | ÷ | 18 | × | ( | ( | ( | 20 | − | x | ) | ÷ | 18 | ) | + | 49 20 | ÷ | 690 | ) | = | ( | ( | 20 | − | x | ) | ÷ | 18 | ) | ( | ( | ( | 20 | + | x | ) | ÷ | 18 | ) | + | 42 25 | ÷ | 342 | ) |
| ( | 20 | + | x | ) | ÷ | 18 | × | ( | ( | ( | 20 | − | x | ) | ÷ | 18 | ) | + | 49 20 | ÷ | 690 | ) | = | ( | 20 | − | x | ) | ÷ | 18 | × | ( | ( | ( | 20 | + | x | ) | ÷ | 18 | ) | + | 42 25 | ÷ | 342 | ) |
| 20 | × | 1 18 | ( | ( | ( | 20 | − | x | ) | ÷ | 18 | ) | + | 49 20 | ÷ | 690 | ) | + | x | × | 1 18 | ( | ( | ( | 20 | − | x | ) | ÷ | 18 | ) | + | 49 20 | ÷ | 690 | ) | = | ( | 20 | − | x | ) | × | 1 18 | ( | ( | ( | 20 | + | x | ) | ÷ | 18 | ) | + | 42 25 | ÷ | 342 | ) |
| 20 | × | 1 18 | ( | ( | ( | 20 | − | x | ) | ÷ | 18 | ) | + | 49 20 | ÷ | 690 | ) | + | x | × | 1 18 | ( | ( | ( | 20 | − | x | ) | ÷ | 18 | ) | + | 49 20 | ÷ | 690 | ) | = | 20 | × | 1 18 | ( | ( | ( | 20 | + | x | ) | ÷ | 18 | ) | + | 42 25 | ÷ | 342 | ) | − | x | × | 1 18 | ( | ( | ( | 20 | + | x | ) | ÷ | 18 | ) | + | 42 25 | ÷ | 342 | ) |
10 9 | ( | ( | ( | 20 | − | x | ) | ÷ | 18 | ) | + | 49 20 | ÷ | 690 | ) | + | x | × | 1 18 | ( | ( | ( | 20 | − | x | ) | ÷ | 18 | ) | + | 49 20 | ÷ | 690 | ) | = | 10 9 | ( | ( | ( | 20 | + | x | ) | ÷ | 18 | ) | + | 42 25 | ÷ | 342 | ) | − | x | × | 1 18 | ( | ( | ( | 20 | + | x | ) | ÷ | 18 | ) | + | 42 25 | ÷ | 342 | ) |
10 9 | ( | ( | 20 | − | x | ) | ÷ | 18 | ) | + | 10 9 | × | 49 20 | ÷ | 690 | + | x | × | 1 18 | ( | ( | ( | 20 | − | x | ) | ÷ | 18 | ) | + | 49 20 | ÷ | 690 | ) | = | 10 9 | ( | ( | ( | 20 | + | x | ) | ÷ | 18 | ) | + | 42 25 | ÷ | 342 | ) | − | x | × | 1 18 | ( | ( | ( | 20 | + | x | ) | ÷ | 18 | ) | + | 42 25 | ÷ | 342 | ) |
10 9 | ( | ( | 20 | − | x | ) | ÷ | 18 | ) | + | 10 9 | × | 49 20 | ÷ | 690 | + | x | × | 1 18 | ( | ( | ( | 20 | − | x | ) | ÷ | 18 | ) | + | 49 20 | ÷ | 690 | ) | = | 10 9 | ( | ( | 20 | + | x | ) | ÷ | 18 | ) | + | 10 9 | × | 42 25 | ÷ | 342 | − | x | × | 1 18 | ( | ( | ( | 20 | + | x | ) | ÷ | 18 | ) | + | 42 25 | ÷ | 342 | ) |
10 9 | ( | ( | 20 | − | x | ) | ÷ | 18 | ) | + | 49 12420 | + | x | × | 1 18 | ( | ( | ( | 20 | − | x | ) | ÷ | 18 | ) | + | 49 20 | ÷ | 690 | ) | = | 10 9 | ( | ( | 20 | + | x | ) | ÷ | 18 | ) | + | 14 2565 | − | x | × | 1 18 | ( | ( | ( | 20 | + | x | ) | ÷ | 18 | ) | + | 42 25 | ÷ | 342 | ) |
10 9 | ( | 20 | − | x | ) | ÷ | 18 | + | 49 12420 | + | x | × | 1 18 | ( | ( | ( | 20 | − | x | ) | ÷ | 18 | ) | + | 49 20 | ÷ | 690 | ) | = | 10 9 | ( | ( | 20 | + | x | ) | ÷ | 18 | ) | + | 14 2565 | − | x | × | 1 18 | ( | ( | ( | 20 | + | x | ) | ÷ | 18 | ) | + | 42 25 | ÷ | 342 | ) |
10 9 | ( | 20 | − | x | ) | ÷ | 18 | + | 49 12420 | + | x | × | 1 18 | ( | ( | ( | 20 | − | x | ) | ÷ | 18 | ) | + | 49 20 | ÷ | 690 | ) | = | 10 9 | ( | 20 | + | x | ) | ÷ | 18 | + | 14 2565 | − | x | × | 1 18 | ( | ( | ( | 20 | + | x | ) | ÷ | 18 | ) | + | 42 25 | ÷ | 342 | ) |
5 81 | ( | 20 | − | x | ) | + | 49 12420 | + | x | × | 1 18 | ( | ( | ( | 20 | − | x | ) | ÷ | 18 | ) | + | 49 20 | ÷ | 690 | ) | = | 5 81 | ( | 20 | + | x | ) | + | 14 2565 | − | x | × | 1 18 | ( | ( | ( | 20 | + | x | ) | ÷ | 18 | ) | + | 42 25 | ÷ | 342 | ) |
5 81 | × | 20 | − | 5 81 | x | + | 49 12420 | + | x | × | 1 18 | ( | ( | ( | 20 | − | x | ) | ÷ | 18 | ) | + | 49 20 | ÷ | 690 | ) | = | 5 81 | ( | 20 | + | x | ) | + | 14 2565 | − | x | × | 1 18 | ( | ( | ( | 20 | + | x | ) | ÷ | 18 | ) | + | 42 25 | ÷ | 342 | ) |
5 81 | × | 20 | − | 5 81 | x | + | 49 12420 | + | x | × | 1 18 | ( | ( | ( | 20 | − | x | ) | ÷ | 18 | ) | + | 49 20 | ÷ | 690 | ) | = | 5 81 | × | 20 | + | 5 81 | x | + | 14 2565 | − | x | × | 1 18 | ( | ( | ( | 20 | + | x | ) | ÷ | 18 | ) | + | 42 25 | ÷ | 342 | ) |
100 81 | − | 5 81 | x | + | 49 12420 | + | x | × | 1 18 | ( | ( | ( | 20 | − | x | ) | ÷ | 18 | ) | + | 49 20 | ÷ | 690 | ) | = | 100 81 | + | 5 81 | x | + | 14 2565 | − | x | × | 1 18 | ( | ( | ( | 20 | + | x | ) | ÷ | 18 | ) | + | 42 25 | ÷ | 342 | ) |
46147 37260 | − | 5 81 | x | + | x | × | 1 18 | ( | ( | ( | 20 | − | x | ) | ÷ | 18 | ) | + | 49 20 | ÷ | 690 | ) | = | 9542 7695 | + | 5 81 | x | − | x | × | 1 18 | ( | ( | ( | 20 | + | x | ) | ÷ | 18 | ) | + | 42 25 | ÷ | 342 | ) |
46147 37260 | − | 5 81 | x | + | x | × | 1 18 | ( | ( | 20 | − | x | ) | ÷ | 18 | ) | + | x | × | 1 18 | × | 49 20 | ÷ | 690 | = | 9542 7695 | + | 5 81 | x | − | x | × | 1 18 | ( | ( | ( | 20 | + | x | ) | ÷ | 18 | ) | + | 42 25 | ÷ | 342 | ) |
46147 37260 | − | 5 81 | x | + | x | × | 1 18 | ( | ( | 20 | − | x | ) | ÷ | 18 | ) | + | x | × | 1 18 | × | 49 20 | ÷ | 690 | = | 9542 7695 | + | 5 81 | x | − | x | × | 1 18 | ( | ( | 20 | + | x | ) | ÷ | 18 | ) | − | x | × | 1 18 | × | 42 25 | ÷ | 342 |
46147 37260 | − | 5 81 | x | + | x | × | 1 18 | ( | ( | 20 | − | x | ) | ÷ | 18 | ) | + | x | × | 49 248400 | = | 9542 7695 | + | 5 81 | x | − | x | × | 1 18 | ( | ( | 20 | + | x | ) | ÷ | 18 | ) | − | x | × | 7 25650 |
46147 37260 | − | 45853 745200 | x | + | x | × | 1 18 | ( | ( | 20 | − | x | ) | ÷ | 18 | ) | = | 9542 7695 | + | 4729 76950 | x | − | x | × | 1 18 | ( | ( | 20 | + | x | ) | ÷ | 18 | ) |
46147 37260 | − | 45853 745200 | x | + | x | × | 1 18 | ( | 20 | − | x | ) | ÷ | 18 | = | 9542 7695 | + | 4729 76950 | x | − | x | × | 1 18 | ( | ( | 20 | + | x | ) | ÷ | 18 | ) |
46147 37260 | − | 45853 745200 | x | + | x | × | 1 18 | ( | 20 | − | x | ) | ÷ | 18 | = | 9542 7695 | + | 4729 76950 | x | − | x | × | 1 18 | ( | 20 | + | x | ) | ÷ | 18 |
46147 37260 | − | 45853 745200 | x | + | x | × | 1 324 | ( | 20 | − | x | ) | = | 9542 7695 | + | 4729 76950 | x | − | x | × | 1 324 | ( | 20 | + | x | ) |
46147 37260 | − | 45853 745200 | x | + | x | × | 1 324 | × | 20 | − | x | × | 1 324 | x | = | 9542 7695 | + | 4729 76950 | x | − | x | × | 1 324 | ( | 20 | + | x | ) |
| x1= | √2588343 500 |