| 51 | × | 47 | + | x | + | 15 | ( | 50 | − | x | ) | = | 10100 |
| 方程左边 = | 2397 | + | x | + | 15 | ( | 50 | − | x | ) |
| 2397 | + | x | + | 15 | ( | 50 | − | x | ) | = | 10100 |
| 方程左边 = | 2397 | + | x | + | 15 | × | 50 | − | 15 | x |
| = | 2397 | + | x | + | 750 | − | 15 | x |
| = | 3147 | − | 14 | x |
| 3147 | − | 14 | x | = | 10100 |
| - | 14 | x | = | 10100 | − | 3147 |
| - | 14 | x | = | 6953 |
| - | 6953 | = | 14 | x |
| 14 | x | = | - | 6953 |
| x | = | - | 6953 | ÷ | 14 |
| = | - | 6953 | × | 1 14 |
| x | = | - | 6953 14 |
| x | = | - 496.642857 |