| ( | 9 100 | − | x | ) | ÷ | ( | 9 100 | − | 10 100 | ) | = | 54 125 | ÷ | 3577 500 |
| 方程两边同时乘以: | ( | 9 100 | − | 10 100 | ) |
| ( | 9 100 | − | x | ) | = | 54 125 | ÷ | 3577 500 | × | ( | 9 100 | − | 10 100 | ) |
9 100 | − | x | = | 54 125 | ÷ | 3577 500 | × | ( | 9 100 | − | 10 100 | ) |
9 100 | − | x | = | 54 125 | ÷ | 3577 500 | × | 9 100 | − | 54 125 | ÷ | 3577 500 | × | 10 100 |
9 100 | − | x | = | 486 89425 | − | 108 17885 |
9 100 | − | x | = | - | 3942 6528025 |
| - | x | = | - | 3942 6528025 | − | 9 100 |
| - | x | = | - | 32409 357700 |
32409 357700 | = | x |
| x | = | 32409 357700 |