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margaryna 82% - g
77%ł+82%g=80%*[ł+g]
ł+g=250
i układzik równan...
0.77ł+0.82g=0.8[ł+g]
ł+g=250
0.77[250-g]+0.82g=200
192,5-0,77g+0,82g=200
0,05g=7,5
5g=750
g=130
ł=120