Hey there! 
For equations like this I usually find the GCF or Factors of the given numbers for both of numbers and factor/solve it from there! 
So, I’ll do the same thing for you.

GCF: 

 (Just distribute and it’ll convert back to the equation in your question
 (Just distribute and it’ll convert back to the equation in your question 
Good luck on your assignment and enjoy your da!
~
