| ( | 3 100 | × | 517 250 | + | 1 | x | ) | ÷ | ( | 517 250 | + | x | ) | − | 1 20 | = | 0 |
| 方程两边同时乘以: | ( | 517 250 | + | x | ) |
| ( | 3 100 | × | 517 250 | + | 1 | x | ) | − | 1 20 | ( | 517 250 | + | x | ) | = | 0 |
3 100 | × | 517 250 | + | 1 | x | − | 1 20 | ( | 517 250 | + | x | ) | = | 0 |
1551 25000 | + | 1 | x | − | 1 20 | ( | 517 250 | + | x | ) | = | 0 |
1551 25000 | + | 1 | x | − | 1 20 | × | 517 250 | − | 1 20 | x | = | 0 |
1551 25000 | + | 1 | x | − | 517 5000 | − | 1 20 | x | = | 0 |
| - | 517 12500 | + | 19 20 | x | = | 0 |
19 20 | x | = | 0 | + | 517 12500 |
19 20 | x | = | 517 12500 |
| x | = | 517 12500 | ÷ | 19 20 |
| = | 517 12500 | × | 20 19 |
| = | 517 625 | × | 1 19 |
| x | = | 517 11875 |
| x | = | 0.043537 |