Tolong dong kak caranya bagaimana besok tugasnya dikumpulin

jawabannya C. 600.000
terigu : 5 kg = 5000 g mentega: 3 kg = 3000g (X) roti tawar ~terigu=80g ~mentega=40g (Y) roti manis~terigu=50g ~mentega=50g [1] 80X + 50Y = 5000 Y = 0 80X = 5000 X = 62,5 (62,5，0) X = 0 50Y = 5000 Y = 100 (0，100) [2] 40X + 50Y = 3000 Y=0 40X = 3000 X = 75 (75，0) X = 0 50Y = 3000 Y = 60 (0，60) [3] 80X + 50Y = 5000 40X + 50Y = 3000 _______________ _ 40X = 2000 X = 50 40X + 50Y = 3000 40(50) + 50Y =3000 2000 + 50Y = 3000 50Y = 1000 Y = 20 (50，20) [4] Z = 8000X + 10.000Y (50，20) = 8000(50) + 10.000(20) = 600.000