SOLUTION: Q The difference in age between a girl and her younger sister is 4 years. The younger sister in turn is 4 years older than her brother.The sum of the ages of the younger sister

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Question 1018986: Q The difference in age
between a girl and her younger sister is 4
years. The younger sister in turn is 4 years
older than her brother.The sum of the ages
of the younger sister and her little brother
is 16.How old are three children?
Answer by josgarithmetic(39620) About Me  (Show Source):
You can put this solution on YOUR website!
g,s,b
girl, younger Sister, brother;

The description can be transcribed into this system of equations:
system%28g-s=4%2Cs-b=4%2Cs%2Bb=16%29


A suggestion is to work with the two equations in variables s and b, to solve for s and b, because just those two equations have the two s and b variables and not involve g. Maybe you can do the Elimination Method in your head part-way to see that s=10, and then go from there....