1389 2500 | = | x | + | ( | x | + | 35 | + | 26 | + | 35 | ) |
| 方程右边 = | x | + | x | + | 35 | + | 26 | + | 35 |
| = | 2 | x | + | 96 |
1389 2500 | = | 2 | x | + | 96 |
| - | 2 | x | = | 96 | − | 1389 2500 |
| - | 2 | x | = | 238611 2500 |
| - | 238611 2500 | = | 2 | x |
| 2 | x | = | - | 238611 2500 |
| x | = | - | 238611 2500 | ÷ | 2 |
| = | - | 238611 2500 | × | 1 2 |
| x | = | - | 238611 5000 |
| x | = | - 47.7222 |