| ( | x | − | x | ÷ | 113 100 | × | 13 100 | ) | ÷ | 689 100 | = | 13 1000 |
| 方程左边 = | x | × | 100 689 | − | x | ÷ | 113 100 | × | 13 100 | × | 100 689 |
| = | x | × | 100 689 | − | x | × | 100 5989 |
| = | 10000 77857 | x |
10000 77857 | x | = | 13 1000 |
| x | = | 13 1000 | ÷ | 10000 77857 |
| = | 13 1000 | × | 77857 10000 |
| x | = | 1012141 10000000 |
| x | = | 0.101214 |