| ( | 11 | ÷ | 8 | ) | a | + | 19 | ÷ | 3 | + | ( | 4 | a | ÷ | 3 | ) | = | 0 |
| 方程左边 = | ( | 11 | ÷ | 8 | ) | a | + | 19 3 | + | ( | 4 | a | ÷ | 3 | ) |
| ( | 11 | ÷ | 8 | ) | a | + | 19 3 | + | ( | 4 | a | ÷ | 3 | ) | = | 0 |
| 方程左边 = | 11 | ÷ | 8 | × | a | + | 19 3 | + | ( | 4 | a | ÷ | 3 | ) |
| = | 11 8 | a | + | 19 3 | + | ( | 4 | a | ÷ | 3 | ) |
| = | 11 8 | a | + | 19 3 | + | 4 | a | ÷ | 3 |
| = | 11 8 | a | + | 19 3 | + | 4 3 | a |
| = | 65 24 | a | + | 19 3 |
65 24 | a | + | 19 3 | = | 0 |
65 24 | a | = | 0 | − | 19 3 |
65 24 | a | = | - | 19 3 |
| a | = | - | 19 3 | ÷ | 65 24 |
| = | - | 19 3 | × | 24 65 |
| = | - | 19 | × | 8 65 |
| a | = | - | 152 65 |
| a | = | - 2.338462 |