| ( | 100000 | ( | x | − | 10 | ) | − | 960000 | ) | × | 75 100 | ÷ | ( | 100000 | x | ) | = | 81 500 |
| 方程两边同时乘以: | ( | 100000 | x | ) |
| ( | 100000 | ( | x | − | 10 | ) | − | 960000 | ) | × | 75 100 | = | 81 500 | ( | 100000 | x | ) |
| 100000 | ( | x | − | 10 | ) | × | 75 100 | − | 960000 | × | 75 100 | = | 81 500 | ( | 100000 | x | ) |
| 100000 | ( | x | − | 10 | ) | × | 75 100 | − | 960000 | × | 75 100 | = | 81 500 | × | 100000 | x |
| 75000 | ( | x | − | 10 | ) | − | 720000 | = | 16200 | x |
| 75000 | x | − | 75000 | × | 10 | − | 720000 | = | 16200 | x |
| 75000 | x | − | 750000 | − | 720000 | = | 16200 | x |
| 75000 | x | − | 1470000 | = | 16200 | x |
| 75000 | x | − | 16200 | x | = | 1470000 |
| 58800 | x | = | 1470000 |
| x | = | 1470000 | ÷ | 58800 |
| = | 1470000 | × | 1 58800 |
| = | 25 | × | 1 |
| x | = | 25 |