Let x = # of pounds of beef. Then the # of pounds of beef is 5x, and the # of pounds of fish is 5x. For the total, you have this equation x + 5x + 4x = 200, 10x = 200, x = 200/10 = 20. ANSWER. 20 pounds of beef, 5*20 = 100 pounds of chicken and 4*20 = 80 pounds of fish.