SOLUTION: sarah is twice as old as her youngest brother. If the difference between their ages is 15 years. How old is her youngest brother? That is the question I have in front of me and

Question 458077: sarah is twice as old as her youngest brother. If the difference between their ages is 15 years. How old is her youngest brother?
That is the question I have in front of me and im wondering if its missing something, don't I need to know how old sarah is?
Answer by richwmiller(17219) (Show Source): You can put this solution on YOUR website!
You know Sarah is twice as old as her brother. You know the Sarah is the older and that the older is 15 years more than the younger.
You have sufficient information to form two equations in two unknowns.

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