?? I don’t really get it, what should I do.
Answer:

Step-by-step explanation:
The number of t-shirts a in month n is 70% of the number of t-shirts in month n-1 plus 25 because they always sell 30% of the t-shirts and get 25 t-shirts in shipments.
can be included as an after-thought.
Answer:
me and my teacher say yes
A negative plus a positive equals a negative