13 20 | × | 3000 | ( | x | + | 11 | ) | = | 3000 | x | + | 48000 |
方程左边 = | 1950 | ( | x | + | 11 | ) |
1950 | ( | x | + | 11 | ) | = | 3000 | x | + | 48000 |
方程左边 = | 1950 | x | + | 1950 | × | 11 |
= | 1950 | x | + | 21450 |
1950 | x | + | 21450 | = | 3000 | x | + | 48000 |
1950 | x | − | 3000 | x | = | 48000 | − | 21450 |
- | 1050 | x | = | 48000 | − | 21450 |
- | 1050 | x | = | 26550 |
- | 26550 | = | 1050 | x |
1050 | x | = | - | 26550 |
x | = | - | 26550 | ÷ | 1050 |
= | - | 26550 | × | 1 1050 |
= | - | 177 | × | 1 7 |
x | = | - | 177 7 |
x | = | - 25.285714 |