| ( | 4131 100 | ( | 1 | + | 20 100 | ) | ) | + | ( | 3 100 | x | ) | = | x |
| 方程左边 = | 4131 100 | ( | 1 | + | 20 100 | ) | + | ( | 3 100 | x | ) |
| = | 4131 100 | × | 1 | + | 4131 100 | × | 20 100 | + | ( | 3 100 | x | ) |
| = | 4131 100 | + | 4131 500 | + | ( | 3 100 | x | ) |
| = | 12393 250 | + | ( | 3 100 | x | ) |
| = | 12393 250 | + | 3 100 | x |
12393 250 | + | 3 100 | x | = | x |
3 100 | x | − | x | = | - | 12393 250 |
| - | 97 100 | x | = | - | 12393 250 |
12393 250 | = | 97 100 | x |
97 100 | x | = | 12393 250 |
| x | = | 12393 250 | ÷ | 97 100 |
| = | 12393 250 | × | 100 97 |
| = | 12393 5 | × | 2 97 |
| x | = | 24786 485 |
| x | = | 51.105155 |