| X | ÷ | 500 | + | 100 | ÷ | 108 | + | 100 | ÷ | 130 | + | 10 | ÷ | 6679 50 | = | 187 50000 | ( | 220 | + | X | ) |
| 方程左边 = | X | × | 1 500 | + | 25 27 | + | 10 13 | + | 500 6679 |
| = | 1 500 | X | + | 4149505 2344329 |
1 500 | X | + | 4149505 2344329 | = | 187 50000 | ( | 220 | + | X | ) |
| 方程右边 = | 187 50000 | × | 220 | + | 187 50000 | X |
| = | 2057 2500 | + | 187 50000 | X |
1 500 | X | + | 4149505 2344329 | = | 2057 2500 | + | 187 50000 | X |
1 500 | X | − | 187 50000 | X | = | 2057 2500 | − | 4149505 2344329 |
| - | 87 50000 | X | = | 2057 2500 | − | 4149505 2344329 |
| - | 87 50000 | X | = | - | 5551477747 5860822500 |
5551477747 5860822500 | = | 87 50000 | X |
87 50000 | X | = | 5551477747 5860822500 |
| X | = | 5551477747 5860822500 | ÷ | 87 50000 |
| = | 5551477747 5860822500 | × | 50000 87 |
| = | 5551477747 2344329 | × | 20 87 |
| X | = | 111029554940 203956623 |