50 | × | 21 | + | x | × | 41 | = | ( | 100 | + | x | ) | × | 25 |
方程左边 = | 1050 | + | x | × | 41 |
1050 | + | 41 | x | = | ( | 100 | + | x | ) | × | 25 |
方程右边 = | 100 | × | 25 | + | x | × | 25 |
= | 2500 | + | x | × | 25 |
1050 | + | 41 | x | = | 2500 | + | 25 | x |
41 | x | − | 25 | x | = | 2500 | − | 1050 |
16 | x | = | 2500 | − | 1050 |
16 | x | = | 1450 |
x | = | 1450 | ÷ | 16 |
= | 1450 | × | 1 16 |
= | 725 | × | 1 8 |
x | = | 725 8 |
x | = | 90.625 |