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odp B
2/3 sok
x - 2/3
3/4x - g
x g - 2/3 * 3/4 2*3/3*4=6/12=1/2 B jest prawidłowa
1 dzbanek -------> ⅔ l
¾dzbanka -------> x l
x = ¾*⅔ = ½l
potrzeba pół litra soku
odp. b