To answer this question, you could use algebra.
If the number of cheeseburgers was three times the number of hamburgers, we could write this as.
Cheeseburgers= 3x and Hamburgers = x
We can then write an expression for the total number of burgers.
4x = 352
Divide both sides by four.
x = 88
Because hamburgers = x in relation to the cheeseburgers, that would mean the number of hamburgers sold on monday was 88.