Question 705742: The total of three sisters' ages is 39. Dina is half as old as Michelle and 3 years younger than Juliette. How old are the sisters? Found 2 solutions by stanbon, lynnlo:Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! The total of three sisters' ages is 39. Dina is half as old as Michelle and 3 years younger than Juliette. How old are the sisters?
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Equations:
D + M + J = 39
D = (1/2)M
D = J - 3
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Modify:
D + M + J = 39
M = 2D
J = D + 3
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Substitute for "M" and for "J": solve for "D":
D + 2D + D+3 = 39
4D = 36
D = 9 years (Dina's age now)
M = 2D = 18 years (Michelle's age now)
J = D+3 = 12 years (Juliette's age now)
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Cheers,
Stan H.
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