| ( | x | + | 1 25 | ) | ÷ | ( | x | + | 9 25 | ) | = | 9 | ÷ | 49 |
| 方程两边同时乘以: | ( | x | + | 9 25 | ) |
| ( | x | + | 1 25 | ) | = | 9 | ÷ | 49 | × | ( | x | + | 9 25 | ) |
| x | + | 1 25 | = | 9 | ÷ | 49 | × | ( | x | + | 9 25 | ) |
| x | + | 1 25 | = | 9 | ÷ | 49 | × | x | + | 9 | ÷ | 49 | × | 9 25 |
| x | + | 1 25 | = | 9 49 | x | + | 81 1225 |
| x | − | 9 49 | x | = | 81 1225 | − | 1 25 |
40 49 | x | = | 81 1225 | − | 1 25 |
40 49 | x | = | 32 1225 |
| x | = | 32 1225 | ÷ | 40 49 |
| = | 32 1225 | × | 49 40 |
| = | 4 25 | × | 1 5 |
| x | = | 4 125 |
| x | = | 0.032 |