How old is pepe if in 9 years he will be 4 years as old as he is now?

This is in the wrong forum as it clearly has nothing to do with taxes.

{MOd Note: Moved Please be more careful in the future about choosing an appropriate fourm<>}

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Let the age of Pepe right now be p.

How old would he be in 9 years?

And I think you made a typing mistake. Your question should read:
How old is pepe if in 9 years he will be 4 times as old as he is now?

So equate his age in 9 years with four times his current age.