I explained Concept 1 in an easy to understand way,
I explained Concept 2 in an easy to understand way,
I explained Concept 3 in an easy to understand way.
Can I say:
I explained those concepts in some easy to understand ways
There are 3 concepts, so there will be 3 ways to explain.
So, it should be fine.
However, I am not sure whether other people will think
"there are 3 concept, so there should be 3 ways to explain" or "there are 3 concepts, but there may be more than or less than 3 ways to explain those concepts".
I explained these concepts in an easy way to be (better) understood.
(You explained 3 concepts. So, you focused on 3 different ideas or methods and you elaborated 3 different explanations to enlighten each one.)