Originally Posted by

**MathStudent1** Thank you ThePerfectHacker. I made a typo when I first made my post. Sorry about that. So, it should be 14m + 21n = 100 not 101.

I am beening taught to turn this into a if/then statement and go from there.

If m and n are integers, then 14m + 21n = 100

Factor out a 7 givng us 7(2n +3m) = 100

From here I have trouble. Also, should the if/then statement be not equal to 100 instead of equal to? I haven't had that much experience with proof by contradiction. Thank You.