| 2 | ( | 5 | + | x | + | 96 5 | ) | = | 50 | + | 212 | − | 2 | x | + | 311 5 |
| 方程左边 = | 2 | × | 5 | + | 2 | x | + | 2 | × | 96 5 |
| = | 10 | + | 2 | x | + | 192 5 |
| = | 242 5 | + | 2 | x |
242 5 | + | 2 | x | = | 50 | + | 212 | − | 2 | x | + | 311 5 |
| 方程右边 = | 1621 5 | − | 2 | x |
242 5 | + | 2 | x | = | 1621 5 | − | 2 | x |
| 2 | x | + | 2 | x | = | 1621 5 | − | 242 5 |
| 4 | x | = | 1621 5 | − | 242 5 |
| 4 | x | = | 1379 5 |
| x | = | 1379 5 | ÷ | 4 |
| = | 1379 5 | × | 1 4 |
| x | = | 1379 20 |
| x | = | 68.95 |