| ( | 254250 | − | ( | 153094 | + | X | ) | ) | ÷ | ( | 153094 | + | X | ) | = | 20 100 | X |
| 方程两边同时乘以: | ( | 153094 | + | X | ) |
| ( | 254250 | − | ( | 153094 | + | X | ) | ) | = | 20 100 | X | ( | 153094 | + | X | ) |
| 254250 | − | ( | 153094 | + | X | ) | = | 20 100 | X | ( | 153094 | + | X | ) |
| 254250 | − | ( | 153094 | + | X | ) | = | 20 100 | X | × | 153094 | + | 20 100 | X | X |
| 254250 | − | ( | 153094 | + | X | ) | = | 153094 5 | X | + | 20 100 | X | X |
| 254250 | − | 153094 | − | X | = | 153094 5 | X | + | 20 100 | X | X |
| 101156 | − | X | = | 153094 5 | X | + | 20 100 | X | X |