SOLUTION: Dolores is three times as old as Darlene and the sum of their ages is 48. How old is Darlene?

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Question 1158954: Dolores is three times as old as Darlene and the sum of their ages is 48. How old is Darlene?
Found 3 solutions by Alan3354, josgarithmetic, ikleyn:
Answer by Alan3354(69443) About Me  (Show Source):
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
r Dolores
n Darlene
system%28r=3n%2Cr%2Bn=48%29
use any method you want.

Answer by ikleyn(52800) About Me  (Show Source):
You can put this solution on YOUR website!
.

All problems of this kind can be (and should be) answered / solved mentally,

as they are simply to check if you know the multiplication table and if you are able
calculate mentally and quickly in your mind.