| ( | 136 | + | 5 | x | ) | ÷ | ( | 37 | + | x | ) | = | 97 20 |
| 方程两边同时乘以: | ( | 37 | + | x | ) |
| ( | 136 | + | 5 | x | ) | = | 97 20 | ( | 37 | + | x | ) |
| 136 | + | 5 | x | = | 97 20 | ( | 37 | + | x | ) |
| 136 | + | 5 | x | = | 97 20 | × | 37 | + | 97 20 | x |
| 136 | + | 5 | x | = | 3589 20 | + | 97 20 | x |
| 5 | x | − | 97 20 | x | = | 3589 20 | − | 136 |
3 20 | x | = | 3589 20 | − | 136 |
3 20 | x | = | 869 20 |
| x | = | 869 20 | ÷ | 3 20 |
| = | 869 20 | × | 20 3 |
| = | 869 | × | 1 3 |
| x | = | 869 3 |
| x | = | 289.666667 |