100 | × | 138 5 | + | x | × | 217 10 | = | ( | 100 | + | x | ) | × | 25 |
方程左边 = | 2760 | + | x | × | 217 10 |
2760 | + | 217 10 | x | = | ( | 100 | + | x | ) | × | 25 |
方程右边 = | 100 | × | 25 | + | x | × | 25 |
= | 2500 | + | x | × | 25 |
2760 | + | 217 10 | x | = | 2500 | + | 25 | x |
217 10 | x | − | 25 | x | = | 2500 | − | 2760 |
- | 33 10 | x | = | 2500 | − | 2760 |
- | 33 10 | x | = | - | 260 |
260 | = | 33 10 | x |
33 10 | x | = | 260 |
x | = | 260 | ÷ | 33 10 |
= | 260 | × | 10 33 |
x | = | 2600 33 |
x | = | 78.787879 |