What is the present age of Kim, given that the ratio between her age and her sisters age 7 years ago was 4:3, and her sister is presently 31 years old. Choose the correct choice from the following.
A) 23	B) 19	C) 22	D) 21	E) 24
Let the present ages of Kim's sister and Kim be 4x years and 3x years respectively   4x+7 = 35   4x = 28   x = 7   Kim's age = 3x = 21 years   Answer is 21
<result>D</result>
What is the present age of Kim, given that the ratio between her age and her sisters age 7 years ago was 4:3, and her sister is presently 31 years old.