Question 150247
Luisa is 5 years younger than her sister Sigrid,8 years from now she will be four-fifths as old as her sister will be then. How old is each now?
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Let Luisa be x yrs old now
The Sigrid is x+5 yrs old now
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Luisa is x+8 yrs old eight years from now.
Sigrid is (x+5)+8 eight years from now
EQUATION:
x+8 = (4/5)((x+5)+8)
5x + 40 = 4x + 52
x = 12 (Luisa's age now)
x+5 = 17 (Sigrid's age now)
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Cheers,
Stan H.