Question 1132913: Samuel has two daughters, Sonya and Alice. One of them is half as old as Sonya. 60 is the total age of both of them. How old is Alice?
Answer by Theo(13342)   (Show Source):
You can put this solution on YOUR website! s = age of sonya
a = age of alice
total age is 60, therefore s + a = 60
alice is half as old as sonya, therefore a = 1/2 * s
replace a with 1/2 * s in the equation of s + a = 60 to get s + 1/2 * s = 60.
combine like terms to get 3/2 * s = 60
solve for s to get s = 2/3 * 60 = 40
s = 40
a is half of s, therefore 20
40 + 20 = 60
solution looks good.
solution is that sonya is 40 and alice is 20.
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