Znajdz liczbe cztery razy wiekszą od ilorazu liczb 3 1/2 i 2 4/5 powiekszonego o jeden
4* (3,5 / 2,8 + 1) = 4* (1,25+1)=4* 2,25 = 9
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4* (3,5 / 2,8 + 1) = 4* (1,25+1)=4* 2,25 = 9