Explanation:
I see only 2 stories and equations.
a.
6(x + 3) = 24
is for the first story (6 show tickets and snacks).
3(x + 6) = 24
is for the second story (juice for 3 friends).
b.
in the first story it is the price of one ticket to the show.
in the second story it is the original amount of juice each friend gets before adding 6 oz.
c. and d.
6(x + 3) = 24
6x + 18 = 24
6x = 6
x = 1
each ticket to the show was $1.
3(x + 6) = 24
3x + 18 = 24
3x = 6
x = 2
each of the 3 friends got first 2 oz of juice, before they each got additional 6 oz. so, ultimately, each friend got 8 oz.