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.