October 2018 1 71 Report

\begin{cases} \frac{1}{2}x+\frac{1}{4}y=\frac{1}{2}\\4x+y=-4\\ \end{cases}

\begin{cases} \frac{x-2}{3}+\frac{y+1}{2}=3\x\\x - 2y=1 \end{cases}

\begin{cases} 2x+2y= 3 (x+y)+4\\4 (x+y) -4 = 7(x-y)\\ \end{cases}

potrzebuje !!!


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