Respuesta :
If it was asking for the amount that Chris made, the answer would be 18.
Hope this helps!<3
Set up an equation.
x+x+4=22
the varibles x are the unknown number of boxes. the first x is Chris amount and the second is Seans amount.
Isolate the variable:
x+x+4=22
2x+4=22
2x=18
x=9
Chris has 9 boxes.
Add 4 to the variable to get Seans amount:
9+4=13
Sean has 13 boxes
To check your answer add the results together to get the correct sum.
9+13=22