| ( | 8000 | − | 130371 25 | ) | ÷ | ( | 130371 25 | − | 5000 | ) | = | ( | 13 4 | − | x | ) | ÷ | ( | x | − | 63 20 | ) |
| 方程两边同时乘以: | ( | 130371 25 | − | 5000 | ) | , | ( | x | − | 63 20 | ) |
| ( | 8000 | − | 130371 25 | ) | ( | x | − | 63 20 | ) | = | ( | 13 4 | − | x | ) | ( | 130371 25 | − | 5000 | ) |
| 8000 | ( | x | − | 63 20 | ) | − | 130371 25 | ( | x | − | 63 20 | ) | = | ( | 13 4 | − | x | ) | ( | 130371 25 | − | 5000 | ) |
| 8000 | ( | x | − | 63 20 | ) | − | 130371 25 | ( | x | − | 63 20 | ) | = | 13 4 | ( | 130371 25 | − | 5000 | ) | − | x | ( | 130371 25 | − | 5000 | ) |
| 8000 | x | − | 8000 | × | 63 20 | − | 130371 25 | ( | x | − | 63 20 | ) | = | 13 4 | ( | 130371 25 | − | 5000 | ) | − | x | ( | 130371 25 | − | 5000 | ) |
| 8000 | x | − | 8000 | × | 63 20 | − | 130371 25 | ( | x | − | 63 20 | ) | = | 13 4 | × | 130371 25 | − | 13 4 | × | 5000 | − | x | ( | 130371 25 | − | 5000 | ) |
| 8000 | x | − | 25200 | − | 130371 25 | ( | x | − | 63 20 | ) | = | 1694823 100 | − | 16250 | − | x | ( | 130371 25 | − | 5000 | ) |
| 8000 | x | − | 25200 | − | 130371 25 | ( | x | − | 63 20 | ) | = | 69823 100 | − | x | ( | 130371 25 | − | 5000 | ) |
| 8000 | x | − | 25200 | − | 130371 25 | x | + | 130371 25 | × | 63 20 | = | 69823 100 | − | x | ( | 130371 25 | − | 5000 | ) |
| 8000 | x | − | 25200 | − | 130371 25 | x | + | 130371 25 | × | 63 20 | = | 69823 100 | − | x | × | 130371 25 | + | x | × | 5000 |
| 8000 | x | − | 25200 | − | 130371 25 | x | + | 8213373 500 | = | 69823 100 | − | x | × | 130371 25 | + | x | × | 5000 |
69629 25 | x | − | 4386627 500 | = | 69823 100 | − | 5371 25 | x |
69629 25 | x | + | 5371 25 | x | = | 69823 100 | + | 4386627 500 |
| 3000 | x | = | 69823 100 | + | 4386627 500 |
| 3000 | x | = | 2367871 250 |
| x | = | 2367871 250 | ÷ | 3000 |
| = | 2367871 250 | × | 1 3000 |
| x | = | 2367871 750000 |
| x | = | 3.157161 |