actually I just got the answer, so no help needed thank you anyway

An animal breeder can buy four types of food for Vietnamese pot-bellied pigs. Each case of Brand A contains 25 units of fiber, 30 units of protein, and 30 units of fat. Each case of Brand B contains 100 units of fiber, 90 units of protein, and 70 units of fat. Each case of Brand C contains 275 units of fiber, 240 units of protein, and 190 units of fat. Each case of Brand D contains 100 units of fiber. 90 units of protein, and 60 units of fat. How many cases of each brand should the breeder mix together to obtain a food that provides 3950 units of fiber, 3480 units of protein, and 2740 units of fat? Let x represent the number of cases of Brand A, y represent the number of cases of Brand B, z represent the number of cases of Brand C, and w represent be the number of cases of Brand D. There are four ways in which the breeder can mix brands to obtain a food that provides 3950 units of fiber, 3480 units of protein and 2740 units of fat If w=0, the solution is (0. 12. 10,0) if w=1 the solution is (1.8, 11.1). If w-2, the solution is ( 24.12.2) IfW=3 the solution is (9. Z8,3) An animal breeder can buy four types of food for Vietnamese pot-bellied pigs. Each case of Brand A contains 25 units of fiber, 30 units of protein, and 30 units of fat. Each case of Brand B contains 100 units of fiber, 90 units of protein, and 70 units of fat. Each case of Brand C contains 275 units of fiber, 240 units of protein, and 190 units of fat. Each case of Brand D contains 100 units of fiber. 90 units of protein, and 60 units of fat. How many cases of each brand should the breeder mix together to obtain a food that provides 3950 units of fiber, 3480 units of protein, and 2740 units of fat? Let x represent the number of cases of Brand A, y represent the number of cases of Brand B, z represent the number of cases of Brand C, and w represent be the number of cases of Brand D. There are four ways in which the breeder can mix brands to obtain a food that provides 3950 units of fiber, 3480 units of protein and 2740 units of fat If w=0, the solution is (0. 12. 10,0) if w=1 the solution is (1.8, 11.1). If w-2, the solution is ( 24.12.2) IfW=3 the solution is (9. Z8,3)