28 25 | x | + | 26 25 | ( | 180 | − | x | ) | = | 180 | + | 76 5 |
| 方程左边 = | 28 25 | x | + | 26 25 | × | 180 | − | 26 25 | x |
| = | 28 25 | x | + | 936 5 | − | 26 25 | x |
| = | 2 25 | x | + | 936 5 |
2 25 | x | + | 936 5 | = | 180 | + | 76 5 |
| 方程右边 = | 976 5 |
2 25 | x | + | 936 5 | = | 976 5 |
2 25 | x | = | 976 5 | − | 936 5 |
2 25 | x | = | 8 |
| x | = | 8 | ÷ | 2 25 |
| = | 8 | × | 25 2 |
| = | 4 | × | 25 |
| x | = | 100 |