| 2 | ( | 5 | + | x | + | 441 10 | ) | = | 50 | + | 240 | − | 2 | x |
| 方程左边 = | 2 | × | 5 | + | 2 | x | + | 2 | × | 441 10 |
| = | 10 | + | 2 | x | + | 441 5 |
| = | 491 5 | + | 2 | x |
491 5 | + | 2 | x | = | 50 | + | 240 | − | 2 | x |
| 方程右边 = | 290 | − | 2 | x |
491 5 | + | 2 | x | = | 290 | − | 2 | x |
| 2 | x | + | 2 | x | = | 290 | − | 491 5 |
| 4 | x | = | 290 | − | 491 5 |
| 4 | x | = | 959 5 |
| x | = | 959 5 | ÷ | 4 |
| = | 959 5 | × | 1 4 |
| x | = | 959 20 |
| x | = | 47.95 |