SOLUTION: Erica's uncle is 3 times as old as she is now. Four years ago, he was 4 times as old as she was then. How old is Erica now?
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Question 756314: Erica's uncle is 3 times as old as she is now. Four years ago, he was 4 times as old as she was then. How old is Erica now? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! Erica's uncle is 3 times as old as she is now. Four years ago, he was 4 times as old as she was then. How old is Erica now?
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Equations:
u = 3e
u-4 = 4(e-4)
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Substitute and solve for "e":
3e-4 = 4e-16
Erica = 12 years
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Solve for "u":
u = 3e
Uncle = 36 years
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Cheers,
Stan H.
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