| ( | 5 | ( | 436 | + | x | ) | + | 734 | ) | ÷ | ( | 693 | + | x | ) | = | 23 5 |
| 方程两边同时乘以: | ( | 693 | + | x | ) |
| ( | 5 | ( | 436 | + | x | ) | + | 734 | ) | = | 23 5 | ( | 693 | + | x | ) |
| 5 | ( | 436 | + | x | ) | + | 734 | = | 23 5 | ( | 693 | + | x | ) |
| 5 | ( | 436 | + | x | ) | + | 734 | = | 23 5 | × | 693 | + | 23 5 | x |
| 5 | ( | 436 | + | x | ) | + | 734 | = | 15939 5 | + | 23 5 | x |
| 5 | × | 436 | + | 5 | x | + | 734 | = | 15939 5 | + | 23 5 | x |
| 2180 | + | 5 | x | + | 734 | = | 15939 5 | + | 23 5 | x |
| 2914 | + | 5 | x | = | 15939 5 | + | 23 5 | x |
| 5 | x | − | 23 5 | x | = | 15939 5 | − | 2914 |
2 5 | x | = | 15939 5 | − | 2914 |
2 5 | x | = | 1369 5 |
| x | = | 1369 5 | ÷ | 2 5 |
| = | 1369 5 | × | 5 2 |
| = | 1369 | × | 1 2 |
| x | = | 1369 2 |
| x | = | 684.5 |