January 2019 0 11 Report
Potrzebuje na jutro !

 \frac{x}{2x+1}= \frac{4}{5}
 \frac{2x}{4}= \frac{8x-1}{3}
 \frac{2x-1}{5}= \frac{4x-1}{4}

DAJE NAJ !
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