100 | × | 22 | + | x | × | 41 | = | ( | 100 | + | x | ) | × | 25 |
方程左边 = | 2200 | + | x | × | 41 |
2200 | + | 41 | x | = | ( | 100 | + | x | ) | × | 25 |
方程右边 = | 100 | × | 25 | + | x | × | 25 |
= | 2500 | + | x | × | 25 |
2200 | + | 41 | x | = | 2500 | + | 25 | x |
41 | x | − | 25 | x | = | 2500 | − | 2200 |
16 | x | = | 2500 | − | 2200 |
16 | x | = | 300 |
x | = | 300 | ÷ | 16 |
= | 300 | × | 1 16 |
= | 75 | × | 1 4 |
x | = | 75 4 |
x | = | 18.75 |