| ( | 5 | ( | 49 | + | x | ) | + | 9 | + | 2 | + | 8 | ) | ÷ | ( | 49 | + | x | + | 2 | + | 3 | + | 1 | ) | = | 24 5 |
| 方程两边同时乘以: | ( | 49 | + | x | + | 2 | + | 3 | + | 1 | ) |
| ( | 5 | ( | 49 | + | x | ) | + | 9 | + | 2 | + | 8 | ) | = | 24 5 | ( | 49 | + | x | + | 2 | + | 3 | + | 1 | ) |
| 5 | ( | 49 | + | x | ) | + | 9 | + | 2 | + | 8 | = | 24 5 | ( | 49 | + | x | + | 2 | + | 3 | + | 1 | ) |
| 5 | ( | 49 | + | x | ) | + | 9 | + | 2 | + | 8 | = | 24 5 | × | 49 | + | 24 5 | x | + | 24 5 | × | 2 | + | 24 5 | × | 3 | + | 24 5 | × | 1 |
| 5 | ( | 49 | + | x | ) | + | 9 | + | 2 | + | 8 | = | 1176 5 | + | 24 5 | x | + | 48 5 | + | 72 5 | + | 24 5 |
| 5 | ( | 49 | + | x | ) | + | 19 | = | 264 | + | 24 5 | x |
| 5 | × | 49 | + | 5 | x | + | 19 | = | 264 | + | 24 5 | x |
| 245 | + | 5 | x | + | 19 | = | 264 | + | 24 5 | x |
| 264 | + | 5 | x | = | 264 | + | 24 5 | x |
| 5 | x | − | 24 5 | x | = | 264 | − | 264 |
1 5 | x | = | 264 | − | 264 |
1 5 | x | = | 0 |
| x | = | 0 | ÷ | 1 5 |
| = | 0 | × | 5 |
| x | = | 0 |