Let's simplify the given expression step-by-step:

Expression:
$2(5a - 4a) + 6a$

1. Simplify inside the parentheses:

   $5a - 4a = a$

2. Substitute the simplified term back:

   $2(a) + 6a$

3. Distribute the 2:

   $2a + 6a$

4. Combine like terms:

   $2a + 6a = 8a$

So, the simplified expression is:

$8a$

Would you like further details or have any questions?

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Related Questions:

1. How do you handle more complex expressions with nested parentheses?
2. What happens if we include different variables, like $a$ and $b$?
3. How do you factor the final simplified expression $8a$?
4. What if there are exponents involved, such as $a^2$?
5. Can this be visualized on a graph? If so, what would it look like?

Tip:

Always simplify expressions inside parentheses first to avoid errors in larger calculations!