Question 899289
Molly's sister is three years younger than twice her age. If the sum of their ages is 24, what is each of their ages?
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Equations:
s = 2m - 3
s + m = 24
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Substitute for "s" and solve for "m"::
2m-3 + m = 24
3m = 27
m = 9 (Molly's age now)
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Solve for "s":
s = 2m -3
s = 18-3 = 15 yrs (sister's age now)
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Cheers,
Stan H.
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