How to dilute a solution with same volume?

I have a solution 5M. into 2L. and I want to dilute it to any value less than 5M such as 3M or 2.5M "into 2L" . please help me... or:I have a solution

I have a solution 5M. into 2L. and I want to dilute it to any value less than 5M such as 3M or 2.5M "into 2L" . please help me...

or:I have a solution 5M. into 2L. and I want to dilute it to any value less than 5M such as 3M or 2.5M \"into 2L\" . please help me...

or:Just add more water, stir, and pour some out. Is that the exact question? It doesn't actually sound like a question.

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