Variable a is 4 more than variable b. Variable a is also 1 less than b. Which of the following pairs of equations best models the relationship between a and b? (4 points)

Question

A: a = b + 4
a = b − 1

B: a = 4b
a = b + 1

C: b = a + 4
b = a − 1

D: b = 4a
b = a + 1

Answer 1

The correct pair of equations would be:

A: a = b + 4
a = b − 1