Explicación paso a paso:
a ) arroz, leche , cafe = -1/2 + 1/5 + 3/ 5 = 13/ 10 = 1,3 kg
b) cafe y leche = 3/5 + 1/5 = 4 / 5 = 0,8 kg
c) arroz y harina = 2/4 + 1/4 = 3/4 = 0, 75 kg
d) harina , leche y cafe = 1/4 + 1/5 + 3/5= 1, 05 kg
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Explicación paso a paso:
a ) arroz, leche , cafe = -1/2 + 1/5 + 3/ 5 = 13/ 10 = 1,3 kg
b) cafe y leche = 3/5 + 1/5 = 4 / 5 = 0,8 kg
c) arroz y harina = 2/4 + 1/4 = 3/4 = 0, 75 kg
d) harina , leche y cafe = 1/4 + 1/5 + 3/5= 1, 05 kg