Kim's age is twice that of her sister. when you add kim's age to her sister's age, you get 36. how old is each sister?

The answer is: Kim - 24 years old. Sister - 12 years old.

K - Kim's age
S - sister's age

Kim's age is twice that of her sister: k = 2s 
When you add Kim's age to her sister's age, you get 36: k + s = 36

k = 2s
k + s = 36

2s + s = 36
3s = 36
s = 36 : 3
s = 12

k = 2s
k = 2 * 12
k = 24

Ithink the answer is c just trying to others

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