Turn into an equation and solve

Question

Sewer #1 contains 9 fewer rats than sewer #2. Sewer #2 contains 5 fewer rats than sewer #3. If there are 56 rats in all three sewers combined, how many rats are in sewer #1? 

Answer 1

r represents rats in #3

r - 5 represents rats in #2

r - 5 - 9 represents rats in #!

 

If the sum is 56 can you solve for r?

 

{Who is spending time in sewers counting rats?}