January 2019 1 68 Report
Sprawdź, czy dana para liczb jest rozwiązaniem układu równań
  \left \{ {{x-y=11} \atop{x+y=-8}} \right. x=2, y=6\\ \left \{ {{2x-5y=19} \atop {3x+7y=15}} \right. x=2, y=-3

na dzisiaj, proszę o pomoc :p
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