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b)2i2/5x1i7/8-(1i1/2)x2+(1/2)X3X2=12/5X15/8=-3+3=9/2=4I1/2=4,5
C) 2i1/7+6-3/8x6/1=2i1/7+6-9/4=8i1/7=2i1/4
d)3i3/7-15/7x14/3x1/2=3i3/7-3=3/7
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by Patrycja471
P.S LICZE NA NAJ :#
Polecam sie na przyszlosc :P