| ( | 175 | x | + | 441 5000 | ( | 1 | − | x | ) | ) | ÷ | ( | 7 2000 | x | + | 7 500 | ( | 1 | − | x | ) | ) | = | 25 |
| 方程两边同时乘以: | ( | 7 2000 | x | + | 7 500 | ( | 1 | − | x | ) | ) |
| ( | 175 | x | + | 441 5000 | ( | 1 | − | x | ) | ) | = | 25 | ( | 7 2000 | x | + | 7 500 | ( | 1 | − | x | ) | ) |
| 175 | x | + | 441 5000 | ( | 1 | − | x | ) | = | 25 | ( | 7 2000 | x | + | 7 500 | ( | 1 | − | x | ) | ) |
| 175 | x | + | 441 5000 | ( | 1 | − | x | ) | = | 25 | × | 7 2000 | x | + | 25 | × | 7 500 | ( | 1 | − | x | ) |
| 175 | x | + | 441 5000 | ( | 1 | − | x | ) | = | 7 80 | x | + | 7 20 | ( | 1 | − | x | ) |
| 175 | x | + | 441 5000 | × | 1 | − | 441 5000 | x | = | 7 80 | x | + | 7 20 | ( | 1 | − | x | ) |
| 175 | x | + | 441 5000 | × | 1 | − | 441 5000 | x | = | 7 80 | x | + | 7 20 | × | 1 | − | 7 20 | x |
| 175 | x | + | 441 5000 | − | 441 5000 | x | = | 7 80 | x | + | 7 20 | − | 7 20 | x |
874559 5000 | x | + | 441 5000 | = | - | 21 80 | x | + | 7 20 |
874559 5000 | x | + | 21 80 | x | = | 7 20 | − | 441 5000 |
1751743 10000 | x | = | 7 20 | − | 441 5000 |
1751743 10000 | x | = | 1309 5000 |
| x | = | 1309 5000 | ÷ | 1751743 10000 |
| = | 1309 5000 | × | 10000 1751743 |
| = | 187 | × | 2 250249 |
| x | = | 374 250249 |
| x | = | 0.001495 |