SOLUTION: Jean is twice as old as her brother. If their combined age is 24, how old is Jean?

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Question 1010504: Jean is twice as old as her brother. If their combined age is 24, how old is Jean?
Answer by fractalier(6550) About Me  (Show Source):
You can put this solution on YOUR website!
Call their ages, j and b, so that
j = 2b and
j + b = 24
Now substituting we get
2b + b = 24
3b = 24
b = 8 and then
j = 16