| ( | 2310 | + | X | ) | × | 3 100 | = | X |
| 方程左边 = | 2310 | × | 3 100 | + | X | × | 3 100 |
| = | 693 10 | + | X | × | 3 100 |
693 10 | + | 3 100 | X | = | X |
3 100 | X | − | X | = | - | 693 10 |
| - | 97 100 | X | = | - | 693 10 |
693 10 | = | 97 100 | X |
97 100 | X | = | 693 10 |
| X | = | 693 10 | ÷ | 97 100 |
| = | 693 10 | × | 100 97 |
| = | 693 | × | 10 97 |
| X | = | 6930 97 |
| X | = | 71.443299 |