Question

Pizza is served in the school cafeteria every fourth school day. Tacos are served every third school day. Both pizza and tacos were served today . In how many school days will pizza and tacos be served on the same day again?

Answer 1

I'm sorry Idk how to explain it by equation but if you draw it out you can get the answer

So green lines are normal days and yellow lines are taco days while red lines are pizza days.

So if you draw it out you'll get 13 days