To simplify the expression $2(3a - 4)$, you can distribute the 2 to both terms inside the parentheses:

$2(3a - 4) = 2 \cdot 3a - 2 \cdot 4$

This simplifies to:

$6a - 8$

So, the simplified expression is $6a - 8$.

Would you like any further details or have any questions?

Here are 5 related questions to expand on this topic:

1. How would you solve $2(3a - 4) = 10$?
2. What happens if you factor out the greatest common factor in $6a - 8$?
3. How would you simplify $3(4a - 5) - 2(2a + 3)$?
4. Can you solve $6a - 8 = 0$ for $a$?
5. What is the distributive property and how is it applied in algebraic expressions?

Tip: Always distribute multiplication over both terms inside parentheses before combining like terms.