16 | × | 16 | − | ( | 10 | + | x | ) | ( | 10 | + | x | ) | = | 10 | × | 10 | − | x | x |
方程左边 = | 256 | − | ( | 10 | + | x | ) | ( | 10 | + | x | ) |
256 | − | ( | 10 | + | x | ) | ( | 10 | + | x | ) | = | 10 | × | 10 | − | x | x |
方程左边 = | 256 | − | 10 | ( | 10 | + | x | ) | − | x | ( | 10 | + | x | ) |
= | 256 | − | 10 | × | 10 | − | 10 | x | − | x | ( | 10 | + | x | ) |
= | 256 | − | 100 | − | 10 | x | − | x | ( | 10 | + | x | ) |
= | 156 | − | 10 | x | − | x | ( | 10 | + | x | ) |
= | 156 | − | 10 | x | − | x | × | 10 | − | x | x |
= | 156 | − | 20 | x | − | x | x |
156 | − | 20 | x | − | x | x | = | 10 | × | 10 | − | x | x |
方程右边 = | 100 | − | x | x |
156 | − | 20 | x | − | x | x | = | 100 | − | x | x |
x= | 14 5 |