There is the harvest festival every year on planet Bozone. During that time, most of Bozone residents sit down to rejoice and eat roast snig. Past history illustrates that the reasonable price-demand equation is: p = 150 - 20x where x is number of kilograms of snig sold, and p is price per kilogram of snig in local currency, Bozat. To sell additional kilogram of snig, how much does price require to decrease? Price requires to decrease by Bozats. Solve price-demand equation for x in terms of p.