# How do you combine like terms in 2( a + 4) + 3a?

Apr 7, 2018

Here's how I did it:

#### Explanation:

$2 \left(a + 4\right) + 3 a$

First, we need to distribute (multiply) the $2$ $\left(a + 4\right)$:
$2 \cdot a = 2 a$

$2 \cdot 4 = 8$

Let's put this back into the expression:
$2 a + 8 + 3 a$

To combine like terms, let's first highlight the like terms:
$\textcolor{red}{2 a} + 8 + \textcolor{red}{3 a}$

Now we just add $2 a$ and $3 a$ and write the final expression:
$5 a + 8$

Hope this helps!