| 100 | ( | 245789 10000 | − | x | ) | ÷ | ( | 245789 10000 | − | 58947 2500 | ) | = | 7 25 |
| 方程两边同时乘以: | ( | 245789 10000 | − | 58947 2500 | ) |
| 100 | ( | 245789 10000 | − | x | ) | = | 7 25 | ( | 245789 10000 | − | 58947 2500 | ) |
| 100 | × | 245789 10000 | − | 100 | x | = | 7 25 | ( | 245789 10000 | − | 58947 2500 | ) |
| 100 | × | 245789 10000 | − | 100 | x | = | 7 25 | × | 245789 10000 | − | 7 25 | × | 58947 2500 |
245789 100 | − | 100 | x | = | 1720523 250000 | − | 412629 62500 |