3 2 | ( | 51 10 | x | + | 19 5 | ) | + | 125 8 | = | 91 10 | x | + | 9 |
| 方程左边 = | 3 2 | × | 51 10 | x | + | 3 2 | × | 19 5 | + | 125 8 |
| = | 153 20 | x | + | 57 10 | + | 125 8 |
| = | 153 20 | x | + | 853 40 |
153 20 | x | + | 853 40 | = | 91 10 | x | + | 9 |
153 20 | x | − | 91 10 | x | = | 9 | − | 853 40 |
| - | 29 20 | x | = | 9 | − | 853 40 |
| - | 29 20 | x | = | - | 493 40 |
493 40 | = | 29 20 | x |
29 20 | x | = | 493 40 |
| x | = | 493 40 | ÷ | 29 20 |
| = | 493 40 | × | 20 29 |
| = | 17 2 | × | 1 |
| x | = | 17 2 |
| x | = | 8.5 |