| x | − | ( | x | − | 723 10 | ) | × | 13 100 | − | 723 10 | = | 1 10 | x |
| 方程左边 = | x | − | x | × | 13 100 | + | 723 10 | × | 13 100 | − | 723 10 |
| = | x | − | x | × | 13 100 | + | 9399 1000 | − | 723 10 |
| = | 87 100 | x | − | 62901 1000 |
87 100 | x | − | 62901 1000 | = | 1 10 | x |
87 100 | x | − | 1 10 | x | = | 62901 1000 |
77 100 | x | = | 62901 1000 |
| x | = | 62901 1000 | ÷ | 77 100 |
| = | 62901 1000 | × | 100 77 |
| = | 62901 10 | × | 1 77 |
| x | = | 62901 770 |
| x | = | 81.68961 |