11 200 | x | + | ( | 68 | − | x | ) | × | 6 100 | = | 99 25 |
| 方程左边 = | 11 200 | x | + | 68 | × | 6 100 | − | x | × | 6 100 |
| = | 11 200 | x | + | 102 25 | − | x | × | 6 100 |
| = | - | 1 200 | x | + | 102 25 |
| - | 1 200 | x | + | 102 25 | = | 99 25 |
| - | 1 200 | x | = | 99 25 | − | 102 25 |
| - | 1 200 | x | = | - | 3 25 |
3 25 | = | 1 200 | x |
1 200 | x | = | 3 25 |
| x | = | 3 25 | ÷ | 1 200 |
| = | 3 25 | × | 200 |
| = | 3 | × | 8 |
| x | = | 24 |