4 5 | x | + | 5 2 | = | 41 10 | + | 2 5 | x |
4 5 | x | − | 2 5 | x | = | 41 10 | − | 5 2 |
2 5 | x | = | 41 10 | − | 5 2 |
2 5 | x | = | 8 5 |
| x | = | 8 5 | ÷ | 2 5 |
| = | 8 5 | × | 5 2 |
| = | 4 | × | 1 |
| x | = | 4 |
| ( | 5 | x | − | 25 | ) | × | 6 | = | 90 |
| 方程左边 = | 5 | x | × | 6 | − | 25 | × | 6 |
| = | 30 | x | − | 150 |
| 30 | x | − | 150 | = | 90 |
| 30 | x | = | 90 | + | 150 |
| 30 | x | = | 240 |
| x | = | 240 | ÷ | 30 |
| = | 240 | × | 1 30 |
| = | 8 | × | 1 |
| x | = | 8 |
2 5 | x | + | 18 5 | = | 39 10 | + | 3 10 | x |
2 5 | x | − | 3 10 | x | = | 39 10 | − | 18 5 |
1 10 | x | = | 39 10 | − | 18 5 |
1 10 | x | = | 3 10 |
| x | = | 3 10 | ÷ | 1 10 |
| = | 3 10 | × | 10 |
| = | 3 | × | 1 |
| x | = | 3 |
3 10 | x | + | 7 10 | x | − | 27 10 | = | 33 10 |
| 方程左边 = | 1 | x | − | 27 10 |
| 1 | x | − | 27 10 | = | 33 10 |
| 1 | x | = | 33 10 | + | 27 10 |
| x | = | 33 10 | + | 27 10 |
| x | = | 6 |
| ( | 100 | − | 3 | x | ) | ÷ | 2 | = | 8 |
| 方程左边 = | 100 | × | 1 2 | − | 3 | x | × | 1 2 |
| = | 50 | − | 3 2 | x |
| 50 | − | 3 2 | x | = | 8 |
| - | 3 2 | x | = | 8 | − | 50 |
| - | 3 2 | x | = | - | 42 |
| 42 | = | 3 2 | x |
3 2 | x | = | 42 |
| x | = | 42 | ÷ | 3 2 |
| = | 42 | × | 2 3 |
| = | 14 | × | 2 |
| x | = | 28 |
3 5 | x | + | 1 5 | x | − | 21 5 | = | 19 5 |
| 方程左边 = | 4 5 | x | − | 21 5 |
4 5 | x | − | 21 5 | = | 19 5 |
4 5 | x | = | 19 5 | + | 21 5 |
4 5 | x | = | 8 |
| x | = | 8 | ÷ | 4 5 |
| = | 8 | × | 5 4 |
| = | 2 | × | 5 |
| x | = | 10 |