# How do you simplify #(r + 9)/4 + (r - 3)/2#?

##### 1 Answer

#### Explanation:

In a fraction the top number is the count of what have got. The bottom number is the size indicator of what you are counting.

So

'~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Given:

To be able to directly add the 'counts' make the size indicator of

Consider:

Multiply by 1 but in the form of

Write as:

'~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Factor out the 3 giving: