Answer:
(X,Y) is (20,10) so that mean he made 10 bucks and sold 20 cups
Step-by-step explanation:
Answer: 20+x
Let's petend that x=20
when we add that it us 40 so that means that martha has 40 oreos
this was answer by an unknowed sic grader
solution:
n/2 + 9 = 20
n/2=20-9
n/2=11
n=22
I don't know so sorry!