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4x -cena chleba
6·x +4x = 8
10x =8
x = 0,8zł = 80gr -cena bułki
4x = 4·0,8= 3,20zł -cena chleba
Spr. 6·0,8 + 4·0,8 = 4,8+3,2= 8
Odp. Bułka kosztuje 80gr.