September 2018 2 21 Report

\left \{ {{5x+2y=4} \atop {4x+y=3}} \right \left \{ {{4x-y=2} \atop {3x+7y=1,5}} \right \left \{ {{6x-3y=9} \atop {x+5y=-9,5}} \right

z góry dzięki bd naj ;)


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