Answer:
there are 24 cookies in the 4 boxes
there are 6 cookies in each box
Step-by-step explanation:
Let x = number of cookies in each box
If there are 4 boxes, the total number of cookies in the four boxes are 4x
If a friend brought 1 cookie to add to each box, the friend brought a total of 4 cookies
4x + 4 = 28
Solving for x
4x = 28 - 4
4x = 24
x = 6
Each box contains 6 cookies and there are 24 cookies in 4 boxes
