| ( | 10 100 | − | x | ) | ÷ | ( | 10 100 | − | 15 100 | ) | = | 8300 | ÷ | ( | 8300 | − | ( | - | 3910 | ) | ) |
| 方程两边同时乘以: | ( | 10 100 | − | 15 100 | ) | , | ( | 8300 | − | ( | - | 3910 | ) | ) |
| ( | 10 100 | − | x | ) | ( | 8300 | − | ( | - | 3910 | ) | ) | = | 8300 | ( | 10 100 | − | 15 100 | ) |
10 100 | ( | 8300 | − | ( | - | 3910 | ) | ) | − | x | ( | 8300 | − | ( | - | 3910 | ) | ) | = | 8300 | ( | 10 100 | − | 15 100 | ) |
10 100 | ( | 8300 | − | ( | - | 3910 | ) | ) | − | x | ( | 8300 | − | ( | - | 3910 | ) | ) | = | 8300 | × | 10 100 | − | 8300 | × | 15 100 |
10 100 | ( | 8300 | − | ( | - | 3910 | ) | ) | − | x | ( | 8300 | − | ( | - | 3910 | ) | ) | = | 830 | − | 1245 |
10 100 | ( | 8300 | − | ( | - | 3910 | ) | ) | − | x | ( | 8300 | − | ( | - | 3910 | ) | ) | = | - | 415 |
10 100 | × | 8300 | − | 10 100 | ( | - | 3910 | ) | − | x | ( | 8300 | − | ( | - | 3910 | ) | ) | = | - | 415 |
| 830 | − | 10 100 | ( | - | 3910 | ) | − | x | ( | 8300 | − | ( | - | 3910 | ) | ) | = | - | 415 |
| 830 | + | 10 100 | × | 3910 | − | x | ( | 8300 | − | ( | - | 3910 | ) | ) | = | - | 415 |
| 830 | + | 391 | − | x | ( | 8300 | − | ( | - | 3910 | ) | ) | = | - | 415 |
| 1221 | − | x | ( | 8300 | − | ( | - | 3910 | ) | ) | = | - | 415 |
| 1221 | − | x | × | 8300 | + | x | ( | - | 3910 | ) | = | - | 415 |
| 1221 | − | 8300 | x | − | x | × | 3910 | = | - | 415 |
| 1221 | − | 12210 | x | = | - | 415 |
| - | 12210 | x | = | - | 415 | − | 1221 |
| - | 12210 | x | = | - | 1636 |
| 1636 | = | 12210 | x |
| 12210 | x | = | 1636 |
| x | = | 1636 | ÷ | 12210 |
| = | 1636 | × | 1 12210 |
| = | 818 | × | 1 6105 |
| x | = | 818 6105 |
| x | = | 0.133989 |