| ( | 23080 | + | X | ) | ÷ | ( | 47520 | + | X | ) | = | 1 2 |
| 方程两边同时乘以: | ( | 47520 | + | X | ) |
| ( | 23080 | + | X | ) | = | 1 2 | ( | 47520 | + | X | ) |
| 23080 | + | X | = | 1 2 | ( | 47520 | + | X | ) |
| 23080 | + | X | = | 1 2 | × | 47520 | + | 1 2 | X |
| 23080 | + | X | = | 23760 | + | 1 2 | X |
| X | − | 1 2 | X | = | 23760 | − | 23080 |
1 2 | X | = | 23760 | − | 23080 |
1 2 | X | = | 680 |
| X | = | 680 | ÷ | 1 2 |
| = | 680 | × | 2 |
| X | = | 1360 |