Your question is not complete however, I will input what is likely to complete it.
Question:
A caterer is making cookie trays for upcoming holiday parties. This morning she mad a 4 small trays and 4 large trays, which contain a total of 288 cookies. In the evening, she made 1 small tray and 3 large trays, which contain a total of 180 cookies. How many cookies do the different sized trays contain?
Answer:
Each small tray can contain 18 cookies, while each large tray can contain 54 cookies
Explanation:
Let assign some variables by denoting S = small trays and L = large trays
In the morning; 4S +4L = 288 --eqn 1
In the evening; 1S + 3L = 180 --eqn 2
From eqn 2, S = 180 - 3L ---eqn 3
Substitute eqn 3 into eqn 1
4(180 - 3L) + 4L = 288
720 - 12L + 4L = 288
8L = 432
L = 432/8 = 54
L = 54
Substitute L = 54 into eqn 3
S = 180 - 3L
S = 180 - 3(54)
S = 180 - 162
S = 18
Therefore, each small tray can contain 18 cookies, while each large tray can contain 54 cookies.
Note:
Use this second part of this question (my framed part of the question) to complete yours. You should get your answer adequately.