Question

Manual ate 1/3 of the crackers on the plate. His brother ate 1/4 of the crackers on the plate. There were 5 crackers left on the plate. How many crackers were there to begin with?

Answer 1

x - ((1/3)x + (1/4)x) = 5

x - (7/12)x = 5

(5/12)x = 5

x = 12

There were 12 crackers to begin with.