5225573 20 | − | ( | 5225573 20 | − | x | ) | ÷ | 109 100 | × | 9 100 | = | x |
方程左边 = | 5225573 20 | − | ( | 5225573 20 | − | x | ) | × | 9 109 |
5225573 20 | − | ( | 5225573 20 | − | x | ) | × | 9 109 | = | x |
方程左边 = | 5225573 20 | − | 5225573 20 | × | 9 109 | + | x | × | 9 109 |
= | 5225573 20 | − | 47030157 2180 | + | x | × | 9 109 |
x= | 5225573 20 |