7 10 | x | + | 1 5 | x | − | 17 10 | = | 91 10 |
| 方程左边 = | 9 10 | x | − | 17 10 |
9 10 | x | − | 17 10 | = | 91 10 |
9 10 | x | = | 91 10 | + | 17 10 |
9 10 | x | = | 54 5 |
| x | = | 54 5 | ÷ | 9 10 |
| = | 54 5 | × | 10 9 |
| = | 6 | × | 2 |
| x | = | 12 |
2 5 | x | + | 1 2 | x | + | 3 2 | = | 66 5 |
| 方程左边 = | 9 10 | x | + | 3 2 |
9 10 | x | + | 3 2 | = | 66 5 |
9 10 | x | = | 66 5 | − | 3 2 |
9 10 | x | = | 117 10 |
| x | = | 117 10 | ÷ | 9 10 |
| = | 117 10 | × | 10 9 |
| = | 13 | × | 1 |
| x | = | 13 |
9 10 | x | + | 1 10 | x | − | 47 10 | = | 3 10 |
| 方程左边 = | 1 | x | − | 47 10 |
| 1 | x | − | 47 10 | = | 3 10 |
| 1 | x | = | 3 10 | + | 47 10 |
| x | = | 3 10 | + | 47 10 |
| x | = | 5 |
4 5 | x | + | 13 10 | = | 5 2 | + | 1 5 | x |
4 5 | x | − | 1 5 | x | = | 5 2 | − | 13 10 |
3 5 | x | = | 5 2 | − | 13 10 |
3 5 | x | = | 6 5 |
| x | = | 6 5 | ÷ | 3 5 |
| = | 6 5 | × | 5 3 |
| = | 2 | × | 1 |
| x | = | 2 |
2 5 | x | + | 1 2 | x | − | 11 10 | = | 97 10 |
| 方程左边 = | 9 10 | x | − | 11 10 |
9 10 | x | − | 11 10 | = | 97 10 |
9 10 | x | = | 97 10 | + | 11 10 |
9 10 | x | = | 54 5 |
| x | = | 54 5 | ÷ | 9 10 |
| = | 54 5 | × | 10 9 |
| = | 6 | × | 2 |
| x | = | 12 |
3 5 | x | + | 7 10 | x | + | 39 10 | = | 39 5 |
| 方程左边 = | 13 10 | x | + | 39 10 |
13 10 | x | + | 39 10 | = | 39 5 |
13 10 | x | = | 39 5 | − | 39 10 |
13 10 | x | = | 39 10 |
| x | = | 39 10 | ÷ | 13 10 |
| = | 39 10 | × | 10 13 |
| = | 3 | × | 1 |
| x | = | 3 |