| ( | x | + | 302 | ) | ÷ | ( | x | + | 524 | ) | = | 17 20 |
| 方程两边同时乘以: | ( | x | + | 524 | ) |
| ( | x | + | 302 | ) | = | 17 20 | ( | x | + | 524 | ) |
| x | + | 302 | = | 17 20 | ( | x | + | 524 | ) |
| x | + | 302 | = | 17 20 | x | + | 17 20 | × | 524 |
| x | + | 302 | = | 17 20 | x | + | 2227 5 |
| x | − | 17 20 | x | = | 2227 5 | − | 302 |
3 20 | x | = | 2227 5 | − | 302 |
3 20 | x | = | 717 5 |
| x | = | 717 5 | ÷ | 3 20 |
| = | 717 5 | × | 20 3 |
| = | 239 | × | 4 |
| x | = | 956 |