187 10 | x | + | 65 2 | ( | 1 | − | x | ) | = | 25 |
| 方程左边 = | 187 10 | x | + | 65 2 | × | 1 | − | 65 2 | x |
| = | 187 10 | x | + | 65 2 | − | 65 2 | x |
| = | - | 69 5 | x | + | 65 2 |
| - | 69 5 | x | + | 65 2 | = | 25 |
| - | 69 5 | x | = | 25 | − | 65 2 |
| - | 69 5 | x | = | - | 15 2 |
15 2 | = | 69 5 | x |
69 5 | x | = | 15 2 |
| x | = | 15 2 | ÷ | 69 5 |
| = | 15 2 | × | 5 69 |
| = | 5 2 | × | 5 23 |
| x | = | 25 46 |
| x | = | 0.543478 |