Luke is 4 years older than twice his sister Maya’s age. Sarah is 5 years old.

How old is Maya? Age of Sarah is irrelevant but age of Maya is a information that is important to find Luke's age.

Sorry i wrote the question wrong : Luke is 4 years older than twice his sister age. Sarah is 5 years old. How old is luke?

Luke is 4 years older than twice his sister age. Sarah is 5 years old.

how old is luke?

If Sarah is 5 years old, then Luke's age is:

4 + (2 x 5) =14 years old.

Hey I care about something like 'what if Sarah is not Luke's sister?' something like that.

thee has't not did state yond sarah is luke's sist'r. 

LOL

Luke is 9

That's an easy one.

Luke is 14 years old.