SOLUTION: This year, serena is one-seventh of her cousin's age. Two years from now, serena will be one-fourth of her cousein's age. In how many years will serena be half her cousin's age?
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Question 1095461: This year, serena is one-seventh of her cousin's age. Two years from now, serena will be one-fourth of her cousein's age. In how many years will serena be half her cousin's age?
Answer by Alan3354(69443) (Show Source): You can put this solution on YOUR website!
This year, serena is one-seventh of her cousin's age. Two years from now, serena will be one-fourth of her cousein's age. In how many years will serena be half her cousin's age?
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S = C/7
S+2 = (C+2)/4
Find their ages.
Sub for S in the 2nd eqn:
C/7 + 2 = (C+2)/4
4C + 56 = 7(C+2) = 7C+14
C = 14
S = 2
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Difference = 12 years.
--> 1/2 at ages 12 & 24
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In how many years will serena be half her cousin's age?
In 10 years.
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