9 10 | x | + | 1 2 | x | + | 16 5 | = | 51 5 |
| 方程左边 = | 7 5 | x | + | 16 5 |
7 5 | x | + | 16 5 | = | 51 5 |
7 5 | x | = | 51 5 | − | 16 5 |
7 5 | x | = | 7 |
| x | = | 7 | ÷ | 7 5 |
| = | 7 | × | 5 7 |
| = | 1 | × | 5 |
| x | = | 5 |
4 5 | x | + | 3 10 | x | − | 21 5 | = | 9 |
| 方程左边 = | 11 10 | x | − | 21 5 |
11 10 | x | − | 21 5 | = | 9 |
11 10 | x | = | 9 | + | 21 5 |
11 10 | x | = | 66 5 |
| x | = | 66 5 | ÷ | 11 10 |
| = | 66 5 | × | 10 11 |
| = | 6 | × | 2 |
| x | = | 12 |
9 10 | x | + | 7 5 | = | 14 5 | + | 7 10 | x |
9 10 | x | − | 7 10 | x | = | 14 5 | − | 7 5 |
1 5 | x | = | 14 5 | − | 7 5 |
1 5 | x | = | 7 5 |
| x | = | 7 5 | ÷ | 1 5 |
| = | 7 5 | × | 5 |
| = | 7 | × | 1 |
| x | = | 7 |
| ( | x | − | 12 5 | ) | ÷ | 3 | = | 42 5 |
| 方程左边 = | x | × | 1 3 | − | 12 5 | × | 1 3 |
| = | x | × | 1 3 | − | 4 5 |
1 3 | x | − | 4 5 | = | 42 5 |
1 3 | x | = | 42 5 | + | 4 5 |
1 3 | x | = | 46 5 |
| x | = | 46 5 | ÷ | 1 3 |
| = | 46 5 | × | 3 |
| x | = | 138 5 |
| x | = | 27.6 |
1 2 | x | + | 1 5 | x | − | 5 2 | = | 59 10 |
| 方程左边 = | 7 10 | x | − | 5 2 |
7 10 | x | − | 5 2 | = | 59 10 |
7 10 | x | = | 59 10 | + | 5 2 |
7 10 | x | = | 42 5 |
| x | = | 42 5 | ÷ | 7 10 |
| = | 42 5 | × | 10 7 |
| = | 6 | × | 2 |
| x | = | 12 |
4 5 | x | − | 23 10 | = | 13 10 | + | 1 2 | x |
4 5 | x | − | 1 2 | x | = | 13 10 | + | 23 10 |
3 10 | x | = | 13 10 | + | 23 10 |
3 10 | x | = | 18 5 |
| x | = | 18 5 | ÷ | 3 10 |
| = | 18 5 | × | 10 3 |
| = | 6 | × | 2 |
| x | = | 12 |