| ( | 31869 100 | + | X | ) | ÷ | 24 | × | 3 | × | 5 | = | 6323 50 | + | 13474 25 | − | X |
| 方程左边 = | ( | 31869 100 | + | X | ) | × | 5 8 |
| ( | 31869 100 | + | X | ) | × | 5 8 | = | 6323 50 | + | 13474 25 | − | X |
| 方程左边 = | 31869 100 | × | 5 8 | + | X | × | 5 8 |
| = | 31869 160 | + | X | × | 5 8 |
31869 160 | + | 5 8 | X | = | 6323 50 | + | 13474 25 | − | X |
| 方程右边 = | 33271 50 | − | X |
31869 160 | + | 5 8 | X | = | 33271 50 | − | X |
5 8 | X | + | X | = | 33271 50 | − | 31869 160 |
13 8 | X | = | 33271 50 | − | 31869 160 |
13 8 | X | = | 372991 800 |
| X | = | 372991 800 | ÷ | 13 8 |
| = | 372991 800 | × | 8 13 |
| = | 372991 100 | × | 1 13 |
| X | = | 372991 1300 |
| X | = | 286.916154 |