SOLUTION: 1.a certain number of matches are needed to fill 24 boxes with each boxes containing the same number of matches .when 4 less matches are put in to each box, there are enough for 28

Hi, this previously posted.

Let x and (x-4) represent the number of matches filling 24 amd 28 boxes respectively

Note: the Total number of matches is the same filling the 24 and 28 boxes

 24x = 28(x-4)

solving for x

 24x = 28x - 112

 112 = 4x

  28 = x, the number in each of the 24 boxes

24*28 = 672 is the total number of matches



CHECKING our answer

  24boxes*28matches/box = 28boxes*24matches/box = 672