Answer: B
I think......
Step-by-step explanation:
28 each book 155-15=140 and then 140÷5=28
Answer:
Step-by-step explanation:

Answer:
y= -1
Step-by-step explanation:
divide both side by 3
then you'll get -5+2=7
subtract 2 from both sides to get
-5y=5
divide -5 on both sides and you'll get y= -1
(hope my explanation made sense to you)