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x-0,125x=x-1/8 x = 7/8x cena po obnizce
7/8x=49
x=49*8/7=7*8=56 zl
Odp. Przed obnizka bluzka kosztowala 56 zl.
x-0,125x=x-1/8
x = 7/8x cena po obniżce
7/8x=49
x=49*8/7=7*8=56 zl