Question 1039131
let that same number be equal to x.
you get:
the first box contains 5x.
the second box contains 4x.
the third box contains 3x.
the fourth box contains 6x.
the total number of mugs in the 4 boxes is equal to 18x.
x can't be less than 1, so the smallest number of coffee mugs in the office has to be 18.
5 in the first box plus 4 in the second box plus 3 in the third box plus 6 in the fourth box = 18 total.