February 2019 0 15 Report
Rozwiąż równania:
a) 20-(2x+5)= \frac{1}{2}(x-4)-2x
b)  \frac{x-6}{x-3} = \frac{x-4}{x+1}
c) 3(5x+14)+[7-7(x+7)-x]=7x
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