| ( | x | − | 8 100 | ) | ÷ | ( | 9 100 | − | 8 100 | ) | = | ( | 0 | − | 2449 25 | ) | ÷ | ( | - | 97 50 | − | 2449 25 | ) |
| 方程两边同时乘以: | ( | 9 100 | − | 8 100 | ) | , | ( | - | 97 50 | − | 2449 25 | ) |
| ( | x | − | 8 100 | ) | ( | - | 97 50 | − | 2449 25 | ) | = | ( | 0 | − | 2449 25 | ) | ( | 9 100 | − | 8 100 | ) |
| x | ( | - | 97 50 | − | 2449 25 | ) | − | 8 100 | ( | - | 97 50 | − | 2449 25 | ) | = | ( | 0 | − | 2449 25 | ) | ( | 9 100 | − | 8 100 | ) |
| x | ( | - | 97 50 | − | 2449 25 | ) | − | 8 100 | ( | - | 97 50 | − | 2449 25 | ) | = | 0 | ( | 9 100 | − | 8 100 | ) | − | 2449 25 | ( | 9 100 | − | 8 100 | ) |
| - | x | × | 97 50 | − | x | × | 2449 25 | − | 8 100 | ( | - | 97 50 | − | 2449 25 | ) | = | 0 | ( | 9 100 | − | 8 100 | ) | − | 2449 25 | ( | 9 100 | − | 8 100 | ) |
| - | x | × | 97 50 | − | x | × | 2449 25 | − | 8 100 | ( | - | 97 50 | − | 2449 25 | ) | = | 0 | × | 9 100 | − | 0 | × | 8 100 | − | 2449 25 | ( | 9 100 | − | 8 100 | ) |
| - | x | × | 97 50 | − | x | × | 2449 25 | − | 8 100 | ( | - | 97 50 | − | 2449 25 | ) | = | 0 | − | 0 | − | 2449 25 | ( | 9 100 | − | 8 100 | ) |
| - | 999 10 | x | − | 8 100 | ( | - | 97 50 | − | 2449 25 | ) | = | 0 | − | 2449 25 | ( | 9 100 | − | 8 100 | ) |
| - | 999 10 | x | + | 8 100 | × | 97 50 | + | 8 100 | × | 2449 25 | = | - | 2449 25 | ( | 9 100 | − | 8 100 | ) |
| - | 999 10 | x | + | 8 100 | × | 97 50 | + | 8 100 | × | 2449 25 | = | - | 2449 25 | × | 9 100 | + | 2449 25 | × | 8 100 |
| - | 999 10 | x | + | 97 625 | + | 4898 625 | = | - | 22041 2500 | + | 4898 625 |
| - | 999 10 | x | + | 999 125 | = | - | 2449 2500 |
| - | 999 10 | x | = | - | 2449 2500 | − | 999 125 |
| - | 999 10 | x | = | - | 22429 2500 |
22429 2500 | = | 999 10 | x |
999 10 | x | = | 22429 2500 |
| x | = | 22429 2500 | ÷ | 999 10 |
| = | 22429 2500 | × | 10 999 |
| = | 22429 250 | × | 1 999 |
| x | = | 22429 249750 |
| x | = | 0.089806 |