Given p is the price for buyers and p-t be the price that suppliers get after paying a tax per unit of t Supply is 2(p-t) and Demand is 100-p a.) what is the equilibrium price ? b.) how many quantities are sold at this price? i'm stucked with the first one , all i know is that when it is equilibrium , S = D i did equate it but i have 2 unknowns .. should i give the P* (equilibrium price) in terms of t ?