Question 748648
we are given the following problem:

A mom bought 28 packages of Reese’s Cups with 88 total cups. Each king size package holds 4 cups. Each regular size package holds two cups. How many of each size did she buy?

let x be the number of king size packages and y be the number of regular size packages, then we have

x+y=28
4x+2y=88

solve the first equation for x,
x=28-y
then substitute for x in the second equation
4*(28-y)+2y=88
112-4y+2y=88
-2y=-24
y=12 and x = 16

she bought 16 king size packages and 12 regular size packages