# How do you simplify 4a + 7 + 2a?

Apr 10, 2016

$6 a + 7$

#### Explanation:

Consider money for a moment. I am English so I am going to use £

Suppose you had 4 lots of £5 notes in your wallet. You then added a further 2 lots of £5 notes. The total lots of £5 would be 4+2.

Ok, we are using the letter 'a' but the same principle applies.

So we have

$\left(4 a + 2 a\right) + 7$

This is the same as

$6 a + 7$

The actual value of $a$ does not matter for this action. All you are doing is counting how many of $a$ you have got.