| ( | 282 | + | x | ) | ÷ | ( | 345 | + | x | ) | = | 83 100 |
| 方程两边同时乘以: | ( | 345 | + | x | ) |
| ( | 282 | + | x | ) | = | 83 100 | ( | 345 | + | x | ) |
| 282 | + | x | = | 83 100 | ( | 345 | + | x | ) |
| 282 | + | x | = | 83 100 | × | 345 | + | 83 100 | x |
| 282 | + | x | = | 5727 20 | + | 83 100 | x |
| x | − | 83 100 | x | = | 5727 20 | − | 282 |
17 100 | x | = | 5727 20 | − | 282 |
17 100 | x | = | 87 20 |
| x | = | 87 20 | ÷ | 17 100 |
| = | 87 20 | × | 100 17 |
| = | 87 | × | 5 17 |
| x | = | 435 17 |
| x | = | 25.588235 |