September 2019 0 50 Report
Rozwiąż układ równań:
a)  \left \{ {{1/4 x - 2 y = - 1} \atop {x+y=5}} \right.
b)  \left \{ {{y-2x=0} \atop {-x+3y=25}} \right.
c)  \left \{ {-2x+y=-2} \atop {2x+2y=14}} \right.
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