| 2 | ( | 5 | + | 96 5 | + | x | ) | = | 50 | + | 1211 5 | + | 331 5 | − | 2 | x |
| 方程左边 = | 2 | × | 5 | + | 2 | × | 96 5 | + | 2 | x |
| = | 10 | + | 192 5 | + | 2 | x |
| = | 242 5 | + | 2 | x |
242 5 | + | 2 | x | = | 50 | + | 1211 5 | + | 331 5 | − | 2 | x |
| 方程右边 = | 1792 5 | − | 2 | x |
242 5 | + | 2 | x | = | 1792 5 | − | 2 | x |
| 2 | x | + | 2 | x | = | 1792 5 | − | 242 5 |
| 4 | x | = | 1792 5 | − | 242 5 |
| 4 | x | = | 310 |
| x | = | 310 | ÷ | 4 |
| = | 310 | × | 1 4 |
| = | 155 | × | 1 2 |
| x | = | 155 2 |
| x | = | 77.5 |