September 2018 1 9 Report

Rozwiąż układy równań :

a) \left \{ {{x+2y=9} \atop {y-1=3x}} \right

b)\left \{ {{x-y=2} \atop {\frac{1}{2}x-1=\frac{1}{4}x}} \right

c) \left \{ {{-x-y=2} \atop {2(3x+y)=-20}} \right

byłabym wdzięczna ...


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