| 51 | × | 47 | + | x | + | 15 | ( | 50 | − | x | ) | = | 22 | × | 101 |
| 方程左边 = | 2397 | + | x | + | 15 | ( | 50 | − | x | ) |
| 2397 | + | x | + | 15 | ( | 50 | − | x | ) | = | 22 | × | 101 |
| 方程左边 = | 2397 | + | x | + | 15 | × | 50 | − | 15 | x |
| = | 2397 | + | x | + | 750 | − | 15 | x |
| = | 3147 | − | 14 | x |
| 3147 | − | 14 | x | = | 22 | × | 101 |
| 方程右边 = | 2222 |
| 3147 | − | 14 | x | = | 2222 |
| - | 14 | x | = | 2222 | − | 3147 |
| - | 14 | x | = | - | 925 |
| 925 | = | 14 | x |
| 14 | x | = | 925 |
| x | = | 925 | ÷ | 14 |
| = | 925 | × | 1 14 |
| x | = | 925 14 |
| x | = | 66.071429 |