| 1020131 | × | 49 100 | − | x | = | 12 25 | ( | 1020131 | − | x | ) |
| 方程左边 = | 49986419 100 | − | x |
49986419 100 | − | x | = | 12 25 | ( | 1020131 | − | x | ) |
| 方程右边 = | 12 25 | × | 1020131 | − | 12 25 | x |
| = | 12241572 25 | − | 12 25 | x |
49986419 100 | − | x | = | 12241572 25 | − | 12 25 | x |
| - | x | + | 12 25 | x | = | 12241572 25 | − | 49986419 100 |
| - | 13 25 | x | = | 12241572 25 | − | 49986419 100 |
| - | 13 25 | x | = | - | 1020131 100 |
1020131 100 | = | 13 25 | x |
13 25 | x | = | 1020131 100 |
| x | = | 1020131 100 | ÷ | 13 25 |
| = | 1020131 100 | × | 25 13 |
| = | 1020131 4 | × | 1 13 |
| x | = | 1020131 52 |
| x | = | 19617.903846 |