7 10 | x | + | 3 | = | 27 5 | + | 1 2 | x |
7 10 | x | − | 1 2 | x | = | 27 5 | − | 3 |
1 5 | x | = | 27 5 | − | 3 |
1 5 | x | = | 12 5 |
| x | = | 12 5 | ÷ | 1 5 |
| = | 12 5 | × | 5 |
| = | 12 | × | 1 |
| x | = | 12 |
9 10 | x | + | 7 2 | = | 19 5 | + | 4 5 | x |
9 10 | x | − | 4 5 | x | = | 19 5 | − | 7 2 |
1 10 | x | = | 19 5 | − | 7 2 |
1 10 | x | = | 3 10 |
| x | = | 3 10 | ÷ | 1 10 |
| = | 3 10 | × | 10 |
| = | 3 | × | 1 |
| x | = | 3 |
9 10 | x | − | 13 10 | = | 7 5 | + | 3 5 | x |
9 10 | x | − | 3 5 | x | = | 7 5 | + | 13 10 |
3 10 | x | = | 7 5 | + | 13 10 |
3 10 | x | = | 27 10 |
| x | = | 27 10 | ÷ | 3 10 |
| = | 27 10 | × | 10 3 |
| = | 9 | × | 1 |
| x | = | 9 |
1 5 | x | + | 4 5 | x | − | 7 5 | = | 48 5 |
| 方程左边 = | 1 | x | − | 7 5 |
| 1 | x | − | 7 5 | = | 48 5 |
| 1 | x | = | 48 5 | + | 7 5 |
| x | = | 48 5 | + | 7 5 |
| x | = | 11 |
| ( | 659 5 | − | x | ) | ÷ | 42 | = | 5 2 |
| 方程左边 = | 659 5 | × | 1 42 | − | x | × | 1 42 |
| = | 659 210 | − | x | × | 1 42 |
659 210 | − | 1 42 | x | = | 5 2 |
| - | 1 42 | x | = | 5 2 | − | 659 210 |
| - | 1 42 | x | = | - | 67 105 |
67 105 | = | 1 42 | x |
1 42 | x | = | 67 105 |
| x | = | 67 105 | ÷ | 1 42 |
| = | 67 105 | × | 42 |
| = | 67 5 | × | 2 |
| x | = | 134 5 |
| x | = | 26.8 |
3 10 | x | = | 7 | − | 2 5 | x |
3 10 | x | + | 2 5 | x | = | 7 |
7 10 | x | = | 7 |
| x | = | 7 | ÷ | 7 10 |
| = | 7 | × | 10 7 |
| = | 1 | × | 10 |
| x | = | 10 |