| ( | x | + | 302 | ) | ÷ | ( | x | + | 524 | ) | = | 3 5 |
| 方程两边同时乘以: | ( | x | + | 524 | ) |
| ( | x | + | 302 | ) | = | 3 5 | ( | x | + | 524 | ) |
| x | + | 302 | = | 3 5 | ( | x | + | 524 | ) |
| x | + | 302 | = | 3 5 | x | + | 3 5 | × | 524 |
| x | + | 302 | = | 3 5 | x | + | 1572 5 |
| x | − | 3 5 | x | = | 1572 5 | − | 302 |
2 5 | x | = | 1572 5 | − | 302 |
2 5 | x | = | 62 5 |
| x | = | 62 5 | ÷ | 2 5 |
| = | 62 5 | × | 5 2 |
| = | 31 | × | 1 |
| x | = | 31 |