You can put this solution on YOUR website! brother 3 yrs ago was 2/3 sisters age.in one year he will be 3/4 her age. find his and her age.
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b-3 = (2/3)(s-3)
b+1 = (3/4))(s+1)
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3b-9 = 2s-6
4b+4 = 3s+3
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3b - 2s = 3
4b - 3s = -1
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12b - 8s = 12
12b - 9s = -3
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Subtract and solve for "s"::
s = 15 (sister's age now)
Solve for "b"::
3b - 2s = 3
3b - 30 = 3
b = 11 years (brother's age now)
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Cheers,
Stan H.
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