SOLUTION: My son is seven times older than my grandson and I am 12 times older than my grandson. If you add all our ages together, the sum is 100 years. Can you tell me my age in years?
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Question 790564: My son is seven times older than my grandson and I am 12 times older than my grandson. If you add all our ages together, the sum is 100 years. Can you tell me my age in years? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! My son is seven times older than my grandson and I am 12 times older than my grandson. If you add all our ages together, the sum is 100 years. Can you tell me my age in years?
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Equations:
s = 7g
f = 12g
f + s + g = 100
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Substitute for s and for f and solve for ":
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12g + 7g + g = 100
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20g = 100
g = 5 (grandson's age now)
s = 7g = 35 (son's age now)
f = 12g = 60 (father's age now)
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Cheers,
Stan H.
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