SOLUTION: A girl is ten years older than her brother, next year she will be twice as old as him, how old is the girl?
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Question 633774: A girl is ten years older than her brother, next year she will be twice as old as him, how old is the girl?
Answer by stanbon(75887) (Show Source): You can put this solution on YOUR website!
A girl is ten years older than her brother, next year she will be twice as old as him, how old is the girl?
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Equations:
g = b + 10
g+1 = 2(b+1)
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Substitute for "g" and solve for "b":
b+10+1 = 2b+2
b = 9
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Solve for "g":
g = b + 10 = 19 (girl's age now)
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Cheers,
Stan H.
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