Problema Solution

Sheila is 1/2 as old as her sister now. In three years, the sum of their ages will be 24. Find the age of Sheila now.

Answer provided by our tutors

Let

x = Sheilas age now

x + 3 = Sheilas age in 3 years

y = Sheilas sister age now

y + 3 = Sheilas sister age in 3 years

x = (1/2)y

(x + 3) + (y + 3) = 24

........

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........

x = 6 years

y = 12 years

Sheila is 6 years old now.