Answers
(A) k = 2a
(B) k + a = 36 or
2a + a = 36 Substituting value of k from answer A above into equation
(C) 3a = 36
Divide both sides by 3 to solve for a
3/3 a = 36/3
a = 12
(D) Kim’s sister Amy’s age is 12
(E) Kim’s age is k=2a
k = 2(12)
k = 24
Kim’s age is 24
To check your work, k + a = 36
24 + 12 = 36
36 = 36
Problem solved!