| ( | 95 | + | x | ) | ÷ | ( | 170 | + | x | ) | = | 31 50 |
| 方程两边同时乘以: | ( | 170 | + | x | ) |
| ( | 95 | + | x | ) | = | 31 50 | ( | 170 | + | x | ) |
| 95 | + | x | = | 31 50 | ( | 170 | + | x | ) |
| 95 | + | x | = | 31 50 | × | 170 | + | 31 50 | x |
| 95 | + | x | = | 527 5 | + | 31 50 | x |
| x | − | 31 50 | x | = | 527 5 | − | 95 |
19 50 | x | = | 527 5 | − | 95 |
19 50 | x | = | 52 5 |
| x | = | 52 5 | ÷ | 19 50 |
| = | 52 5 | × | 50 19 |
| = | 52 | × | 10 19 |
| x | = | 520 19 |
| x | = | 27.368421 |