Respuesta :

Alan is x like it says
Barry is x-10 because he is 10 years younger than Alan
Kevin is 2x as he is 2 times Alan’s age

Therefore
x+x-10+2x=54
4x-10=54
4x=44
x=11
Alan= 11 years old
Barry is = 1 year old
Kevin is = 22 years old