Предмет: Математика, автор: stassu4u

X+y=7
-x+2y=-4
Графический способ

Ответы

Автор ответа: JenniferLawrence

x+y=7 точки графика: (x=0,y=7) (x=1, y=6) (x=2, y=5)
-x+2y=-4 точки графика (x=0, y=-2) (x=1, y=-1,5) (x=2, y=-1)
Точкой пресечения графиков является точка с координатами (x=6, y=1)
это и есть решение системы.

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