| ( | 77 | × | 253 500 | + | x | ) | ÷ | ( | 77 | + | x | ) | = | 3 5 |
| 方程两边同时乘以: | ( | 77 | + | x | ) |
| ( | 77 | × | 253 500 | + | x | ) | = | 3 5 | ( | 77 | + | x | ) |
| 77 | × | 253 500 | + | x | = | 3 5 | ( | 77 | + | x | ) |
| 77 | × | 253 500 | + | x | = | 3 5 | × | 77 | + | 3 5 | x |
19481 500 | + | x | = | 231 5 | + | 3 5 | x |
| x | − | 3 5 | x | = | 231 5 | − | 19481 500 |
2 5 | x | = | 231 5 | − | 19481 500 |
2 5 | x | = | 3619 500 |
| x | = | 3619 500 | ÷ | 2 5 |
| = | 3619 500 | × | 5 2 |
| = | 3619 100 | × | 1 2 |
| x | = | 3619 200 |
| x | = | 18.095 |