英语翻译

题目

英语翻译
Question 3:
The demand and supply functions of a good are given by:
P = – 3Qd + 60
P = 2Qs + 40
respectively.If the government decides to impose a tax of $t per good,show that the equilibrium quantity is given by
Q= 4-1/5t
and write down a similar expression for the equilibrium price.
(A) If it is known that the equilibrium quantity is 3,work out the value of t.How much of this tax is paid by the firm?
(B) If,instead of imposing a tax,the government provides a subsidy of $5 per good,find the new equilibrium price and quantity

答案

你都知道这些题在讲什么意思吗?
A）是5吗?