19 2 | ÷ | 87 | − | 40 | ÷ | 1650 | − | 40 | ÷ | 1000 | + | X | ÷ | 131 | = | 167 100000 | ( | X | + | 179 2 | ) |
| 方程左边 = | 19 174 | − | 4 165 | − | 1 25 | + | X | × | 1 131 |
| = | 717 15950 | + | 1 131 | X |
717 15950 | + | 1 131 | X | = | 167 100000 | ( | X | + | 179 2 | ) |
| 方程右边 = | 167 100000 | X | + | 167 100000 | × | 179 2 |
| = | 167 100000 | X | + | 29893 200000 |
717 15950 | + | 1 131 | X | = | 167 100000 | X | + | 29893 200000 |
1 131 | X | − | 167 100000 | X | = | 29893 200000 | − | 717 15950 |
78123 13100000 | X | = | 29893 200000 | − | 717 15950 |
78123 13100000 | X | = | 6667867 63800000 |
| X | = | 6667867 63800000 | ÷ | 78123 13100000 |
| = | 6667867 63800000 | × | 13100000 78123 |
| = | 6667867 638 | × | 131 78123 |
| X | = | 873490577 49842474 |
| X | = | 17.525024 |