6 5 | ( | a | + | 12 | ) | = | 2 | ( | 148 | − | a | ) |
| 方程左边 = | 6 5 | a | + | 6 5 | × | 12 |
| = | 6 5 | a | + | 72 5 |
6 5 | a | + | 72 5 | = | 2 | ( | 148 | − | a | ) |
| 方程右边 = | 2 | × | 148 | − | 2 | a |
| = | 296 | − | 2 | a |
6 5 | a | + | 72 5 | = | 296 | − | 2 | a |
6 5 | a | + | 2 | a | = | 296 | − | 72 5 |
16 5 | a | = | 296 | − | 72 5 |
16 5 | a | = | 1408 5 |
| a | = | 1408 5 | ÷ | 16 5 |
| = | 1408 5 | × | 5 16 |
| = | 88 | × | 1 |
| a | = | 88 |