| ( | 1 | + | x | ) | ÷ | ( | 1 | + | x | + | 12 125 | ) | = | 10521 10000 |
| 方程两边同时乘以: | ( | 1 | + | x | + | 12 125 | ) |
| ( | 1 | + | x | ) | = | 10521 10000 | ( | 1 | + | x | + | 12 125 | ) |
| 1 | + | x | = | 10521 10000 | ( | 1 | + | x | + | 12 125 | ) |
| 1 | + | x | = | 10521 10000 | × | 1 | + | 10521 10000 | x | + | 10521 10000 | × | 12 125 |
| 1 | + | x | = | 10521 10000 | + | 10521 10000 | x | + | 31563 312500 |
| 1 | + | x | = | 1441377 1250000 | + | 10521 10000 | x |
| x | − | 10521 10000 | x | = | 1441377 1250000 | − | 1 |
| - | 521 10000 | x | = | 1441377 1250000 | − | 1 |
| - | 521 10000 | x | = | 191377 1250000 |
| - | 191377 1250000 | = | 521 10000 | x |
521 10000 | x | = | - | 191377 1250000 |
| x | = | - | 191377 1250000 | ÷ | 521 10000 |
| = | - | 191377 1250000 | × | 10000 521 |
| = | - | 191377 125 | × | 1 521 |
| x | = | - | 191377 65125 |
| x | = | - 2.93861 |