SOLUTION: Nancy's dog is 3 times as old as Susie's dog. Both of their dog's ages equal 27. How old is Nancy's dog?

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Question 507143: Nancy's dog is 3 times as old as Susie's dog. Both of their dog's ages equal 27. How old is Nancy's dog?
Answer by prathyu.2490(2) About Me  (Show Source):
You can put this solution on YOUR website!
let nancy's dog age be 'N'
let susie's dog age be 'S'
"Nancy's dog is 3 times as old as Susie's dog"
HENCE FROM THE ABOVE STATEMENT

N=3S -> (1)
"Both of their dog's ages equal 27 MEANS"
N+S=27; -> (2)
HENCE FROM (1) AND (2) SOLVE FOR N
N=3S ->S=N/3;
SUBSTITUTE THIS IN (2)
->N+(N/3)=27
->4N/3=27;
->N=20.25 YRS OR 20 1/4 YRS