Question 402475: Cindy's age and her older cousin Robert's age together equal 28. Cindys age is 3 times less than Robert's. How old are the cousins? Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! Cindy's age and her older cousin Robert's age together equal 28. Cindys age is 3 times less than Robert's. How old are the cousins?
Equations:
c + r = 28
c = r-3
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Rearrange:
c + r = 28
c - r = -3
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Add and solve for "c":
2c = 25
c = 12.5 (Cindy's age)
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Solve for "r":
c + r = 28
12.5 + r = 28
r = 15.5 (Robert's age)
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Cheers,
Stan H.
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