| X | − | ( | ( | 4879659 100 | + | X | − | 25000 | − | 12385 4 | ) | × | 1 10 | − | 2520 | − | 78959 100 | ) | − | 2477 4 | = | 19950 |
| 方程左边 = | X | − | ( | 4879659 100 | + | X | − | 25000 | − | 12385 4 | ) | × | 1 10 | + | 2520 | + | 78959 100 | − | 2477 4 |
| = | X | − | ( | 4879659 100 | + | X | − | 25000 | − | 12385 4 | ) | × | 1 10 | + | 134517 50 |
| = | X | − | 4879659 100 | × | 1 10 | − | X | × | 1 10 | + | 25000 | × | 1 10 | + | 12385 4 | × | 1 10 | + | 134517 50 |
| = | X | − | 4879659 1000 | − | X | × | 1 10 | + | 2500 | + | 2477 8 | + | 134517 50 |
| = | 9 10 | X | + | 310153 500 |
9 10 | X | + | 310153 500 | = | 19950 |
9 10 | X | = | 19950 | − | 310153 500 |
9 10 | X | = | 9664847 500 |
| X | = | 9664847 500 | ÷ | 9 10 |
| = | 9664847 500 | × | 10 9 |
| = | 9664847 50 | × | 1 9 |
| X | = | 9664847 450 |
| X | = | 21477.437778 |