Question 918525
<pre>
{{{6sqrt(5)+6sqrt(5)+7sqrt(5)}}}

is just like this:

{{{6x+6x+7x=19x}}}

which is just like these:

 6 pencils          6 apples       $6
+6 pencils         +6 apples      +$6
+7 pencils         +7 apples      +$7 
----------         ---------      ---
19 pencils         19 apples      $19

which is just like this:

 6 square roots of five
+6 square roots of five
+7 square roots of five
-----------------------
19 square roots of five

which is exactly the same as:

{{{6sqrt(5)+6sqrt(5)+7sqrt(5)=19sqrt(5)}}} 

Edwin</pre>