| 4 | ( | 3 | x | − | 12 | ) | = | 24 |
| 方程左边 = | 4 | × | 3 | x | − | 4 | × | 12 |
| = | 12 | x | − | 48 |
| 12 | x | − | 48 | = | 24 |
| 12 | x | = | 24 | + | 48 |
| 12 | x | = | 72 |
| x | = | 72 | ÷ | 12 |
| = | 72 | × | 1 12 |
| = | 6 | × | 1 |
| x | = | 6 |
3 5 | x | − | 9 5 | = | 3 5 | + | 3 10 | x |
3 5 | x | − | 3 10 | x | = | 3 5 | + | 9 5 |
3 10 | x | = | 3 5 | + | 9 5 |
3 10 | x | = | 12 5 |
| x | = | 12 5 | ÷ | 3 10 |
| = | 12 5 | × | 10 3 |
| = | 4 | × | 2 |
| x | = | 8 |
7 10 | x | + | 14 5 | = | 26 5 | + | 3 10 | x |
7 10 | x | − | 3 10 | x | = | 26 5 | − | 14 5 |
2 5 | x | = | 26 5 | − | 14 5 |
2 5 | x | = | 12 5 |
| x | = | 12 5 | ÷ | 2 5 |
| = | 12 5 | × | 5 2 |
| = | 6 | × | 1 |
| x | = | 6 |
3 5 | x | + | 5 2 | = | 7 2 | + | 1 10 | x |
3 5 | x | − | 1 10 | x | = | 7 2 | − | 5 2 |
1 2 | x | = | 7 2 | − | 5 2 |
1 2 | x | = | 1 |
| x | = | 1 | ÷ | 1 2 |
| = | 1 | × | 2 |
| x | = | 2 |
1 10 | x | + | 1 5 | x | − | 1 | = | 7 2 |
| 方程左边 = | 3 10 | x | − | 1 |
3 10 | x | − | 1 | = | 7 2 |
3 10 | x | = | 7 2 | + | 1 |
3 10 | x | = | 9 2 |
| x | = | 9 2 | ÷ | 3 10 |
| = | 9 2 | × | 10 3 |
| = | 3 | × | 5 |
| x | = | 15 |
7 10 | x | + | 1 5 | x | − | 37 10 | = | 71 10 |
| 方程左边 = | 9 10 | x | − | 37 10 |
9 10 | x | − | 37 10 | = | 71 10 |
9 10 | x | = | 71 10 | + | 37 10 |
9 10 | x | = | 54 5 |
| x | = | 54 5 | ÷ | 9 10 |
| = | 54 5 | × | 10 9 |
| = | 6 | × | 2 |
| x | = | 12 |