2 | ( | 2 | ( | - | 6 | ) | − | 1 | ) | + | 1 | = | 5 | ( | ( | - | 6 | ) | + | a | ) |
Left side of the equation = | 2 | × | 2 | ( | - | 6 | ) | − | 2 | × | 1 | + | 1 |
= | 4 | ( | - | 6 | ) | − | 2 | + | 1 |
= | 4 | ( | - | 6 | ) | − | 1 |
= | - | 4 | × | 6 | − | 1 |
= | - | 24 | − | 1 |
= | - | 25 |
- | 25 | = | 5 | ( | ( | - | 6 | ) | + | a | ) |
Right side of the equation = | 5 | ( | - | 6 | ) | + | 5 | a |
= | - | 5 | × | 6 | + | 5 | a |
= | - | 30 | + | 5 | a |
- | 25 | = | - | 30 | + | 5 | a |
- | 5 | a | = | - | 30 | + | 25 |
- | 5 | a | = | - | 5 |
5 | = | 5 | a |
5 | a | = | 5 |
a | = | 5 | ÷ | 5 |
= | 5 | × | 1 5 |
= | 1 | × | 1 |
a | = | 1 |