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: