| ( | 77 2500 | − | 3 100 | ) | ÷ | ( | 1 25 | − | 77 2500 | ) | = | ( | x | − | 77797 2000 | ) | ÷ | ( | 27196 625 | − | x | ) |
| 方程两边同时乘以: | ( | 1 25 | − | 77 2500 | ) | , | ( | 27196 625 | − | x | ) |
| ( | 77 2500 | − | 3 100 | ) | ( | 27196 625 | − | x | ) | = | ( | x | − | 77797 2000 | ) | ( | 1 25 | − | 77 2500 | ) |
77 2500 | ( | 27196 625 | − | x | ) | − | 3 100 | ( | 27196 625 | − | x | ) | = | ( | x | − | 77797 2000 | ) | ( | 1 25 | − | 77 2500 | ) |
77 2500 | ( | 27196 625 | − | x | ) | − | 3 100 | ( | 27196 625 | − | x | ) | = | x | ( | 1 25 | − | 77 2500 | ) | − | 77797 2000 | ( | 1 25 | − | 77 2500 | ) |
77 2500 | × | 27196 625 | − | 77 2500 | x | − | 3 100 | ( | 27196 625 | − | x | ) | = | x | ( | 1 25 | − | 77 2500 | ) | − | 77797 2000 | ( | 1 25 | − | 77 2500 | ) |
77 2500 | × | 27196 625 | − | 77 2500 | x | − | 3 100 | ( | 27196 625 | − | x | ) | = | x | × | 1 25 | − | x | × | 77 2500 | − | 77797 2000 | ( | 1 25 | − | 77 2500 | ) |
523523 390625 | − | 77 2500 | x | − | 3 100 | ( | 27196 625 | − | x | ) | = | x | × | 1 25 | − | x | × | 77 2500 | − | 77797 2000 | ( | 1 25 | − | 77 2500 | ) |
523523 390625 | − | 77 2500 | x | − | 3 100 | ( | 27196 625 | − | x | ) | = | 23 2500 | x | − | 77797 2000 | ( | 1 25 | − | 77 2500 | ) |
523523 390625 | − | 77 2500 | x | − | 3 100 | × | 27196 625 | + | 3 100 | x | = | 23 2500 | x | − | 77797 2000 | ( | 1 25 | − | 77 2500 | ) |
523523 390625 | − | 77 2500 | x | − | 3 100 | × | 27196 625 | + | 3 100 | x | = | 23 2500 | x | − | 77797 2000 | × | 1 25 | + | 77797 2000 | × | 77 2500 |
523523 390625 | − | 77 2500 | x | − | 20397 15625 | + | 3 100 | x | = | 23 2500 | x | − | 77797 50000 | + | 5990369 5000000 |
| x1= | 9816927 250000 |