7011 10 | = | ( | 57 | − | x | ) | × | 74 5 | + | 99 10 | x |
| 方程右边 = | 57 | × | 74 5 | − | x | × | 74 5 | + | 99 10 | x |
| = | 4218 5 | − | x | × | 74 5 | + | 99 10 | x |
| = | 4218 5 | − | 49 10 | x |
7011 10 | = | 4218 5 | − | 49 10 | x |
49 10 | x | = | 4218 5 | − | 7011 10 |
49 10 | x | = | 285 2 |
| x | = | 285 2 | ÷ | 49 10 |
| = | 285 2 | × | 10 49 |
| = | 285 | × | 5 49 |
| x | = | 1425 49 |
| x | = | 29.081633 |