Предмет: Алгебра, автор: remixser1oz7n00

Сколько решений имеет система уравнений
x-y=1
3x-3y=-9

Ответы

Автор ответа: Аноним

0

x-y=1 =>x=1+y
3x-3y=-9
3(1+y)-3y=-9
3+3y-3y=-9
3=-9
∅
система не имеет решений

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