Question 903539
fred is 3 years more than two and one-half times his sister's age. of fred is 18, how old is his sister?
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Equation:
f = (2.5)s + 3
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Solve for "s" if f = 18::
18 = (2.5)s + 3
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2.5s = 15
s = 15/2.5
s = 6 years (Sister's age now)
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Cheers,
Stan H.
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