| ( | 5000 | + | x | ) | ÷ | ( | ( | 11000 | + | x | ) | ÷ | ( | 3 4 | × | 1 4 | ) | ) | = | 2 5 |
| 方程两边同时乘以: | ( | ( | 11000 | + | x | ) | ÷ | ( | 3 4 | × | 1 4 | ) | ) |
| ( | 5000 | + | x | ) | = | 2 5 | ( | ( | 11000 | + | x | ) | ÷ | ( | 3 4 | × | 1 4 | ) | ) |
| 5000 | + | x | = | 2 5 | ( | ( | 11000 | + | x | ) | ÷ | ( | 3 4 | × | 1 4 | ) | ) |
| 5000 | + | x | = | 2 5 | ( | 11000 | + | x | ) | ÷ | ( | 3 4 | × | 1 4 | ) |
| 方程两边同时乘以: | ( | 3 4 | × | 1 4 | ) |
| 5000 | ( | 3 4 | × | 1 4 | ) | + | x | ( | 3 4 | × | 1 4 | ) | = | 2 5 | ( | 11000 | + | x | ) |
| 5000 | × | 3 4 | × | 1 4 | + | x | ( | 3 4 | × | 1 4 | ) | = | 2 5 | ( | 11000 | + | x | ) |
| 5000 | × | 3 4 | × | 1 4 | + | x | ( | 3 4 | × | 1 4 | ) | = | 2 5 | × | 11000 | + | 2 5 | x |
1875 2 | + | x | ( | 3 4 | × | 1 4 | ) | = | 4400 | + | 2 5 | x |
1875 2 | + | x | × | 3 4 | × | 1 4 | = | 4400 | + | 2 5 | x |
1875 2 | + | x | × | 3 16 | = | 4400 | + | 2 5 | x |
3 16 | x | − | 2 5 | x | = | 4400 | − | 1875 2 |
| - | 17 80 | x | = | 4400 | − | 1875 2 |
| - | 17 80 | x | = | 6925 2 |
| - | 6925 2 | = | 17 80 | x |
17 80 | x | = | - | 6925 2 |
| x | = | - | 6925 2 | ÷ | 17 80 |
| = | - | 6925 2 | × | 80 17 |
| = | - | 6925 | × | 40 17 |
| x | = | - | 277000 17 |
| x | = | - 16294.117647 |