Question

. 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?

Answer 1

If Kim and her sisters age equal 36 an equation would be k+s=36

Answer 2

K = kims age, s = her sisters age

k = 2s
k + s = 36

2s + s = 36 <== ur equation
3s = 36
s = 36/3
s = 12 <== the sister is 12

k = 2s
k = 2(12)
k = 24 <== Kim is 24