2 5 | x | + | 7 10 | x | + | 17 5 | = | 89 10 |
| 方程左边 = | 11 10 | x | + | 17 5 |
11 10 | x | + | 17 5 | = | 89 10 |
11 10 | x | = | 89 10 | − | 17 5 |
11 10 | x | = | 11 2 |
| x | = | 11 2 | ÷ | 11 10 |
| = | 11 2 | × | 10 11 |
| = | 1 | × | 5 |
| x | = | 5 |
9 10 | x | + | 4 5 | x | − | 1 | = | 41 10 |
| 方程左边 = | 17 10 | x | − | 1 |
17 10 | x | − | 1 | = | 41 10 |
17 10 | x | = | 41 10 | + | 1 |
17 10 | x | = | 51 10 |
| x | = | 51 10 | ÷ | 17 10 |
| = | 51 10 | × | 10 17 |
| = | 3 | × | 1 |
| x | = | 3 |
1 10 | x | + | 2 5 | x | + | 19 10 | = | 29 10 |
| 方程左边 = | 1 2 | x | + | 19 10 |
1 2 | x | + | 19 10 | = | 29 10 |
1 2 | x | = | 29 10 | − | 19 10 |
1 2 | x | = | 1 |
| x | = | 1 | ÷ | 1 2 |
| = | 1 | × | 2 |
| x | = | 2 |
9 10 | x | + | 11 5 | = | 67 10 | + | 2 5 | x |
9 10 | x | − | 2 5 | x | = | 67 10 | − | 11 5 |
1 2 | x | = | 67 10 | − | 11 5 |
1 2 | x | = | 9 2 |
| x | = | 9 2 | ÷ | 1 2 |
| = | 9 2 | × | 2 |
| = | 9 | × | 1 |
| x | = | 9 |
4 5 | x | + | 22 5 | = | 49 5 | + | 1 5 | x |
4 5 | x | − | 1 5 | x | = | 49 5 | − | 22 5 |
3 5 | x | = | 49 5 | − | 22 5 |
3 5 | x | = | 27 5 |
| x | = | 27 5 | ÷ | 3 5 |
| = | 27 5 | × | 5 3 |
| = | 9 | × | 1 |
| x | = | 9 |
9 10 | x | + | 19 5 | = | 59 10 | + | 3 5 | x |
9 10 | x | − | 3 5 | x | = | 59 10 | − | 19 5 |
3 10 | x | = | 59 10 | − | 19 5 |
3 10 | x | = | 21 10 |
| x | = | 21 10 | ÷ | 3 10 |
| = | 21 10 | × | 10 3 |
| = | 7 | × | 1 |
| x | = | 7 |