Question

Bob and his best friend Bill have the same birthday, but Bob is 3 years older than Bill. Let the variable x represent Bob’s age and y represent Bill’s age. Which equation models the relationship between Bill’s age and Bob’s age?

A. y = x/3

B. y = x + 3

C. x = y + 3

D. y = 3x

Answer 1

Bob's age: x
Bill's age: y+3 (because he is 3 years younger than bob and you want to make them equal)
x=y+3

Answer 2

c