Can’t figure this out need help

Question

huey is two years older than dewey. dewey is four less than ten times Louie's Age. How old are they if their ages add to 57

Answer 1

h= 2+d

d=10L-4

h=2+10L-4 =10L-2

h+d+L = 57

10L-2 +10L-4 + L =57

21L = 63

L =63/21 =3 years old for Louie

d=10L-4 =30-4 = 26 years old for Dewey

h =2+d = 28 years old for Huey

3+26+28= 57

= sum of ages of all Donald Duck's 3 nephews,

who all look identical, but with different ages

so apparently not identical triplets