11 5 | ÷ | 87 | − | 40 | ÷ | 1650 | − | 10 | ÷ | 125 | + | X | ÷ | 131 | = | 167 100000 | ( | X | + | 261 5 | ) |
| 方程左边 = | 11 435 | − | 4 165 | − | 2 25 | + | X | × | 1 131 |
| = | - | 1889 23925 | + | 1 131 | X |
| - | 1889 23925 | + | 1 131 | X | = | 167 100000 | ( | X | + | 261 5 | ) |
| 方程右边 = | 167 100000 | X | + | 167 100000 | × | 261 5 |
| = | 167 100000 | X | + | 43587 500000 |
| - | 1889 23925 | + | 1 131 | X | = | 167 100000 | X | + | 43587 500000 |
1 131 | X | − | 167 100000 | X | = | 43587 500000 | + | 1889 23925 |
78123 13100000 | X | = | 43587 500000 | + | 1889 23925 |