September 2018 1 31 Report

Czy ten przyklad jest dobrze??/ jak nie to prosze o poprawienie go;)

\left \{ {{x-2y=-4} \atop {0,5x+y=2}} \right\\ \left \{ {{x=2y+ (-4)} \atop {0,5x+y=2}} \right\\ 0,5(2y+(-4))+y=2\\ 1y+(2y)+y=2\\ 1y+y=2\\ x=2+(-2)\\ x=0 \\ y=2


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