October 2018 2 14 Report

Rozwiąż równania

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

b)\left \{ {{y=+2x-1} \atop {x=y+7}} \right.

c)\left \{ {{x=-3y-7} \atop {3x-2y=12}} \right.

Pilnie potrzebuję . Pliss, nie rozumiem matmy ;//


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