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znajdz liczbe x a)x.4/7=9/11 b)x:6/13=4/9 c)x:3cale1/6=1cala2/3 zad 9 (3cale3/5+2cale4/5):6/7=

b)3/4:4cale1/2+7:1cala1/6=

c)3/5:(1cala1/2-3/4)=


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