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## Homework Statement

If a = f - 2 and b = 4f + 5, what is an expression for b in terms of a?

It's multiple choice:

4a

4a - 4

4a + 2

4a + 7

4a + 13

## The Attempt at a Solution

a = f - 2 and b = 4f + 5

add 2 to each side ----> a = f and b = 4f + 7

my answer is 4a + 7