| ( | 1 | + | 25 100 | ) | x | + | ( | 20 | − | x | ) | ( | 1 | + | 20 100 | ) | = | 246 |
| 方程左边 = | 1 | x | + | 25 100 | x | + | ( | 20 | − | x | ) | ( | 1 | + | 20 100 | ) |
| = | 5 4 | x | + | ( | 20 | − | x | ) | ( | 1 | + | 20 100 | ) |
| = | 5 4 | x | + | 20 | ( | 1 | + | 20 100 | ) | − | x | ( | 1 | + | 20 100 | ) |
| = | 5 4 | x | + | 20 | × | 1 | + | 20 | × | 20 100 | − | x | ( | 1 | + | 20 100 | ) |
| = | 5 4 | x | + | 20 | + | 4 | − | x | ( | 1 | + | 20 100 | ) |
| = | 5 4 | x | + | 24 | − | x | ( | 1 | + | 20 100 | ) |
| = | 5 4 | x | + | 24 | − | x | × | 1 | − | x | × | 20 100 |
| = | 1 20 | x | + | 24 |
1 20 | x | + | 24 | = | 246 |
1 20 | x | = | 246 | − | 24 |
1 20 | x | = | 222 |
| x | = | 222 | ÷ | 1 20 |
| = | 222 | × | 20 |
| x | = | 4440 |